Which sentence correctly uses a hyphen in a compound modifier? My little sister was well-behaved throughout the entire ride. The supplies that you brought were much-needed. A newly-married couple moved into the apartment across the hall. Enrique's dream is to become a full-time singer.

The answer is D. (Enrique's dreams is to become a full time singer)

The correct answer is D. Enrique's dream is to become a full-time singer

Explanation:

In grammar a hyphen (-) is a punctuation mark mainly used to join words or part of them, in the case of compound modifiers which are adjectives or adverbs that modify or describe a noun or verb, hyphen should be used only if the modifier is placed before the word they modify, otherwise, it is not correct to hyphen the words that compound the modifier. Additionally to this, if the modifier contains an adverb which is usually a word that ends in "-ly" but also includes other words such as always, before, now, etc. the hyphen is not required and hyphening this type of modifiers is incorrect. Considering this, the sentence from the choices provided that correctly uses a hyphen in a compound modifier is "Enrique's dream is to become a full-time singer", because in this sentence the compound modifier "full-time" is placed before the noun it describes "singer" and it does not contain any adverb which makes the use of hyphen grammatically correct.