Concept:Choose the verb that correctly expresses the idea of leaving a place.Explanation:The correct option must fit the sense of moving away from somewhere."Depart" means to leave or set out on a journey."Change" means to make or become different."Defect" means to abandon one's side or country."Go" is too general and lacks the intended formal meaning.Therefore, "depart" best completes the sentence.Answer:A. depart