"Candid" means impartial, open, or honest. "Caustic" means burning or sarcastic. "Corporal" means bodily or physical. "Prevalent" means accepted or widespread. "Ubiquitous" means ever-present or pervasive. 

"Cognitive" and "logical" both mean reasonable or rational. "Irrational" means illogical or senseless. "Eclectic" means comprehensive or diverse. "Irascible" means crabby or cantankerous. "Voluble" means talkative or chatty. 

"Veritable" and "bona fide" both mean authentic or actual. "Voracious" means very hungry or greedy. "Ironic" means sarcastic or caustic. "Raucous" means rowdy or rough. "Effusive" means gushing or profuse. 

"Unwitting" is an adjective that means either "not aware of the full facts" when referring to a person, or "not done on purpose; unintentional." So, we need to pick out an adjective that means something like "not aware of the full facts" or "unintentional." "Purposeful" cannot be the correct answer, then, because "purposeful" is an antonym of "unwitting," not a synonym. "Inadvertent," however, is an adjective that means "not resulting from or achieved through deliberate planning," and because it is the answer choir that is closest in meaning to "unwitting," "inadvertent" is the correct answer.

Although one can be said to “verbalize” his or her words when he or she writes them, the term most often is used to describe the process of speaking ideas that were heretofore unspoken. For example, you could say, “After thinking about his theory for a number of years, Paul finally decided to verbalize it, hoping that he could clarify his thoughts by speaking them.”

Because "candid" means truthful and straightforward, or frank, the best answer choice is "truthful."

When something is “legitimate” it is in accord with the laws that would pertain to that class of things. For example, one could speak of a “legitimate action” as being one that is legal. Also, in a more extended sense, it can indicate conformity to the general laws of rationality or that a given thing is rightfully done in a given circumstance. For instance, a “legitimate critique,” is one that is valid given the data of the original argument. Such a critique justly finds something wrong with the argument and is therefore called “valid” or “legitimate.”

The word “specious” comes from the Latin for “appearance” or “beautiful.” When something is “specious,” it appears to be correct but really is not. It is merely apparent. Therefore, it misleads the person who considers it. Often, one will speak of “specious reasoning,” describing thereby some argument that appears to be plausible when in fact it is really false.

"Marginal" is an adjective that can besides meaning "of, relating to, or situated at the edge or margin of something," can also mean " of secondary or minor importance; not central." So, we need to pick out an adjective that means something like "of minor importance." Neither "crucial" nor "monumental" can be the correct answer, then, because each word is an antonym of "marginal," not a synonym. "Negligible," however, is an adjective that means "so small or unimportant as to be not worth considering; insignificant," and because it is the answer choir that is closest in meaning to "marginal," "negligible" is the correct answer.

"Noteworthy" means important or interesting. "Irritating" means annoying or bothersome. "Cryptic" means mysterious or puzzling. "Intelligent" means well-informed or smart. "Brutal" means violent and vicious.