Which statement is true about a complement in grammar?
It is an adverb that modifies an action verb.
It is always located before the linking verb in a sentence.
It helps to complete the meaning of a verb.
It must be part of a prepositional phrase.
A is the better answer
"It is an adverb that modifies an action verb" is the statement among the statements given in the question that is true about a complement in grammar. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has helped you.