Select suitable option:
Many people _____ (be) given up smoking because of growing awareness about ill-effects of smoking.
A verb is used to express an occurrence, action, or state. It is the grammatical centre of the predicate in a sentence.
An auxiliary verb is a verb which gives is used in the formation of tenses, moods, tones, etc.
Option A is correct as the subject is plural and the present perfect is used for an action leading up to the present.
The other options are wrong as the subject is not singular, the past simple tense is used for an action or a series of actions in the past and the past perfect is used for an action or a state before a past time.
The correct answer is A)have.