2. Which of the following statements is true about an adverb?
A. It is a part of speech that modifies a noun or pronoun.
B. It is a part of speech that modifies a verb, adjective, or another adverb.
C. It is a part of speech that tells when, where, and how a thing is done.
D. both b and c

a word or phrase that modifies or qualifies an adjective, verb, or other adverb or a word group, expressing a relation of place, time, circumstance, manner, cause, degree, etc. (e.g., gently, quite, then, there )Adverbs tells how, where, when, why, etc. Depending on the context, the adverb can come before or after the verb or at the beginning or end of a sentence. He completed the course enthusiastically. Enthusiastically describes how he completed the course and answers the how question.