——Why are the tax collectors so busy? ——Many people prefer to have their tax forms complet

——Why are the tax collectors so busy?
——Many people prefer to have their tax forms completed by a professional rather than .
A. do it themselves
B. doing it themselves
C. to do it themselves
D. done by themselves

A. do it themselvesB. doing it themselvesC. to do it themselvesD. done by themselves解析：考查固定结构。prefer to…rather than…意为“宁愿……不愿……”，其后接动词原形。

这个解释是对的