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Here is a detailed explanation to this question-
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Hurricanes at first begin traveling from east to west, because that direction is the way the prevailing winds in the tropics blow, but they then veer off toward higher latitudes, in many cases changing direction toward the east before dissipating over the colder, more northerly waters or overland.
(A) Hurricanes at first begin traveling from east to west, because that direction is the way the prevailing winds in the tropics blow, but
(B) At first, hurricanes travel from east to west, because that is the direction of the prevailing winds in the tropics, but
(C) While hurricanes travel from east to west at first, the direction of the prevailing winds blowing in the tropics, and
(D) Because hurricanes at first travel from east to west, since it is the direction of the prevailing winds in the tropics,
(E) Hurricanes, beginning by traveling from east to west, because this is the direction of the prevailing winds in the tropics.
Choice A: Option A suffers from a great deal of redundancy. The phrase "At first begins" contains a redundancy, as the beginning will always be what took place first. Moreover, the phrases "prevailing winds in the tropics blow" and "that direction is the way" are needlessly wordy. Thus, A is a poor answer choice.
Choice B: Option B is concise, preserves the intended meaning of the sentence, and contains no modifier errors. Thus, Option B is correct.
Choice C: In Option C, we see a modifier error in the placement of the phrase "the direction of the prevailing winds blowing in the tropics". This phrase should be closer to the noun that it is modifying, the direction "east to west". Additionally, the use of "and" is inappropriate here, as the presence of the word "while", in this context, indicates that this sentence is trying to show contrast. Thus Option C alters the meaning of the sentence and is incorrect.
Choice D: In Option D, the use of the word "because" changes the intended meaning of the sentence. The sentence that results from the use of Option D states that the reason behind hurricanes veering off towards higher latitudes is that the hurricanes travel from east to west, which is not the intended meaning. Thus Option D is incorrect.
Choice E: In Option E, if we remove the information between two commas, we get "Hurricanes, they...". As the pronoun "they" refers to the noun "Hurricane", which is the subject of the sentence, we can say that this sentence repeats the subject. For this reason, Option E is a poor answer choice.
Hence, B is the best answer choice. If you are confused by the use of "that" in Option B, rest assured that it is perfectly appropriate, as "that" is serving as a pronoun for "east to west".
To understand the concept of “And v/s other Conjunctions” on the GMAT, you may want to watch the following video (~1 minute):
All the best!
Experts' Global Team