Question

Adverb phrase -
A. a prepositional phrase that modifies a verb, adjective or adverb
B. a prepositional phrase that modified a noun or pronoun
C. a group of words that expresses a complete thought

Answer 1

An adverb phrase is simply a group of two or more words that function as an adverb in a sentence. Just as an adverb can modify a verb, adjective or another adverb, an adverb phrase of more than one word can further describe a verb, adverb, or adjective.

Answer 2

Yes, A is correct.