could you tell me ____ get to the nearest post office?

题目

could you tell me ____ get to the nearest post office?
A.how can I B.how I could
C.how to D.what I can
【还有不能选那个选项的理由!】

答案

C
A 的语序不对,宾语从句不能倒装,
B could 要改为can,因为这是直接引语,前面的could只是为了委婉客气,
D 的what 要改为how 就对了,表方式