Correct Response: B. The underlined portion of the sentence modifies the action in the sentence by describing when the students fed the fish; thus, it is an adverbial clause. A verb phrase is a main verb plus one or more helping verbs, making A incorrect. A noun phrase is a phrase that plays the role of a noun in a sentence, making C incorrect. Finally, the underlined portion of the sentence does not begin with a relative pronoun (e.g., who, that, which), making D incorrect as well.