—  The fishermen should have been warned of the bad weather.

— ________, but they didn't listen to it. [ ]

A. So were they    

B. So should they

C. Yes, they were  

D. Yes, the should have

为保证输入数据的正确性，需进行输入校验。输入校验方法一般包括重复输入校验和（）校验。