The correct answer is A. Ellis Island is not in the coast of Boston, It's in New York City.
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A.
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When
It's Hot, Hot, Hot
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The choice that best describes the sentence and explains how to improve it is: This sentence is complete and correct. It does not need any revision. The sentence above is an example of a complex sentence; it contains both an independent clause and a dependent or subordinate clause. The subordinate clause is introduced by the subordinating conjunction "after". After the comma, the independent clause follows to complete the whole thought of the sentence.