Concept:A positive statement in the present perfect tense takes a negative tag question that repeats the same auxiliary verb.
Explanation:The sentence is
“Jane has stopped smoking,” which contains the present perfect auxiliary
“has.”Because the statement is positive, the question tag must be negative.
Therefore, the tag should use the same auxiliary verb,
“has,” in its negative contracted form:
“hasn’t she?”Option A correctly matches the auxiliary and tense used in the main clause.
Option B changes the auxiliary to
“did,” which does not match the present perfect structure.
Option C uses
“isn’t,” which is incorrect because the main verb is not in the continuous or passive form.
Option D uses
“hadn’t,” which refers to the past perfect tense, not the present perfect.
Thus, only
“hasn’t she” completes the sentence correctly.
Answer:A. hasn’t she