The sentence is trying to explain that in spite of the giant squid's elusiveness, scientists are finding new ways of studying it. The sentence therefore is trying to contrast two ideas, as opposed to showing causation with the word "because." The only answer choice that uses a contrasting conjunction is "Although," so it is the correct answer.

Subordination problems happen when there are two subordinate clauses and no main clause. The "because" and "so" in the original sentence clash with each other. We only need one. That way, the clause from which a subordinating conjunction is omitted becomes an independent clause, and we need at least one independent clause in the sentence for it to be complete.

The underlined phrase, a separate clause further explaining the first half of the sentence, does not work as a complet sentence. In order to appropriately fit after "because," the phrase needs to be turned into a complete thought. "Because they had exorbitant costs" is the best choice among the answers.

No comma or other punctuation is required here to separate the clause "she was the fastest runner" because it is an indirect quotation introduced by "that."

This sentence contains an error in its logic of cause and effect. The first part of the sentence is the reason for the advice offered in the second part. So, you should change "and" to a word that demonstrates the cause-and-effect relationship. Do not add a contrast word like "but" or "although" unless the sentence includes some sort of contradiction or opposition.

Based on the information in this sentence, we can infer that there is a cause-and-effect relationship: as a result of the highway being closed, the speaker had to take a different route to work. “So” is the only conjunction here that indicates cause and effect.

The original problem uses "while" as a subordinating conjunction in a manner that compromises the parallelism related to the gerunds in the example of Gerald's multitasking. All of the incorrect answer choices somehow change the meaning of the original sentence; the correct answer choice also happens to be the most efficient method of communicating the example of Gerald's multitasking.

The two clauses establish a cause-and-effect relationship; thus, "because" is the only correct coordinator.

This question asks about the use of subordinate conjunctions, which join a subordinate clause to a main clause. The subordinate conjunction that would most change the meaning of the sentence is "unless," because the use of "unless" implies that the narrator will only buy a car if he does NOT have a high-paying job. All the other subordinate conjunctions express the causal connection between a high-paying job and the purchase of a car.

This question asks you to analyze how different subordinating conjunctions change the meaning of a sentence. Subordinating conjunctions join a main clause to a subordinate clause. In this sentence, "so that," "so," "in order that," and "because that wzy" all convey the same meaning: eating a big meal is intended to prevent hunger in the future. The subordinating conjunction phrase "even though" reverses the sentence's meaning, implying that the narrator wants to eat a big meal despite the fact that future hunger is unlikely.