Define and Identify the use of Adverbs of Frequency:
She _____ complaints about her work.
An adverb is a word or phrase that qualifies or changes an adjective, verb or another adverb, to express a relation of a situation, cause etc.
An adverb of frequency is used to describe how often something occurs, either in definite or indefinite terms.
The correct answer is A and C as always and never indicate how often she complaints about her work.
The other options are wrong as does not cannot be used here and therefore, one of the options is wrong.
The correct answer is A)always and C)never.