The correct answer is A) True. When a compound modifier, which is made up of two or more words that work together to describe a noun or pronoun, comes directly after the noun it modifies, it should be hyphenated. This is done to ensure clarity and to avoid ambiguity in the sentence. For example, "a well-known author" or "a twenty-year-old student" are compound modifiers that need to be hyphenated to properly convey the intended meaning.
