问题

______ you are supposed to do ______ you don’t like a thing is ______ it. Don’t complain.
A:That; what; change
B:When; that; to change
C:What; when;to change
D:What; that; changing;
B:When; that; to change
C:What; when;to change
D:What; that; changing;
正确答案是: