When we "determine" something, we make a choice to do it in a particular way. For instance, you may have the option of having anything to eat for dinner, but you take this general category of "anything whatsoever" and make a determination—you say, "I will have this and not any of those other things." When a person is described as being "determined," he or she is certain about a given choice. We say things like, "He was determined to win at all costs." This means that he was unwilling to do anything else but win. Such a person does not turn from his or her goal and hence is "unwavering." The options "singular" and "serious" try to get you to confuse the other meanings and choose incorrectly. "Unswerving" is the best option provided.

The word "jubilant" comes from roots that mean to be joyous and make a joyful, shouting noise. Thus, in general, when we say that someone is "jubilant," he or she is very joyous. Thus, the best word offered among your options is "thrilled." When someone is "thrilled," he or she is very excited and joyful.

If you look at your options, there are a few categories you can create. For example, offensive; threatening; and insulting may all fit into a category for their closeness in meaning: they all signal that something bad is being directed at someone. Bombastic is something that makes a big splash, calls your attention immediately, but where nothing much more valuable can be found after the initial big moment. The word that is left is didactic, which describes a person or thing that loves to teach people lessons from a high moral ground, believing, say, they are better than their audience. Moralistic is very close in meaning--someone who always believes they have superior ability to judge others according to their moral character.

"Fickle" is an adjective describing a personality that is temperamental, unpredictable, and changing frequently. For example: "The FICKLE fans changed their favorite team every week, depending on who won or lost."

"Steadfast" is an antonym to "fickle." "Joyful" is an adjective used to describe someone who is extremely happy. "Intelligent" is an adjective used to describe someone who is smart. "Malicious" is an adjective used to describe someone who is mean-spirited.

"Meek" is an adjective meaning humble or tame. For example: "The MEEK child did not cry, complain, or even speak throughout the long journey."

"Arrogant" could be considered an antonym to "meek."

"Docile" is an adjective meaning gentle or obedient. For example: The DOCILE dog does not bark, even when facing strangers."

While a "thoughtful" person may also be described as "docile," the words are not specifically synonymous. "Arrogant" is an adjective used to describe someone who is abrasive, overconfident, and haughty. "Menacing" is an adjective used to describe someone who is intimidating or frightening. "Smooth," when used as a personality adjective, describes someone who is suave.

"Placid" means calm or peaceful. "Tranquil" also means calm or peaceful. For example: "The placid lake made Sienna feel calm and tranquil."

"Saints" or "lakes" can both be called "placid," but they are not synonyms for this word.

The word "loquacious" can be used to describe someone who talks a lot. If you pay attention to the words that are not the correct answer, none adequately describes a loquacious person. Both "quiet" and "sullen" refer to someone who experiences a moment of silence and even sadness, and are thus antonyms to "loquacious;" "redundant" refers to something that is repetitive, and "exceptional" to something that is above average. The process of elmination should have helped you to answer this question.

"Sleazy" means immoral and corrupt, sordid and unpleasant. To provide further help, "porous" means easily penetrated, easily passed through; "diverse" means varied, different; "feisty" means unexpectedly tough, a strong individual who is relatively small; "reluctant" means unwilling. 

"Hapless" means unlucky, consistently unfortunate. You will have noticed that all the answer choices begin with the prefix un-. This is a negating prefix, this means it takes the original meaning of the word and causes it to mean the opposite. For example, "unkind" means not kind and "unpleasant" means not pleasant. Other prefixes in the English language that often have this impact are in- and im-.