From the words or group of words lettered A to D, choose the word or group of words that best completes each of the following sentences. Jane has stopped sm...

The blank space in the sentence indicates the need for a tag question to complete the sentence grammatically. The tag question should be the opposite form of the sentence, and it should match the tense and subject of the main sentence. In this case, the main sentence is in the present perfect tense, and the subject is "Jane has stopped smoking". Therefore, the correct tag question should be in the present perfect tense, with the subject "she" and the opposite form of the verb "stopped". The opposite form of "stopped" is "hasn't stopped". Therefore, the correct tag question is "hasn't she?". This implies "Jane has stopped smoking, hasn't she?".