asks you to get rid of the bad habits is quite right.
A. Who
B. Those who
C. Anyone whom
D. Whoever
网友回答
A. Who
B. Those who
C. Anyone whom
(答案→)D. Whoever
解析：所选答案是主语从句的引导词且在从句中作主语，同时又作了主句的主语，用whoever，因为whoever相当于anyone who(who作主语)，those who中的定语从句要用复数的谓语动词。