Answer:
The correct answer to the question is option C: "Have/do they?"
In the sentence, the verb "has bought" is in the present perfect tense, which is used to describe an action that started in the past and is still relevant in the present. The subject "nobody" is singular, so we need to use the singular form of the verb "have" in the question.
To form a question in the present perfect tense, we invert the subject and the auxiliary verb "have." Since the subject is "nobody," which is singular, we use the singular form of the auxiliary verb "have," which is "has." Therefore, the question should start with "Has."The second part of the question should use the base form of the verb, "do," because we need to form a question in the present simple tense. The pronoun "they" is used as the subject in the question, and "do" is the appropriate verb to use with a plural subject.
Putting it all together, we have "Has nobody...? Do they...?" which is correctly represented by option C: "Have/do they?"
