I don't believe they'll arrive before five o'clock__ __?A do you B do I C do they D will they

I don't believe they'll arrive before five o'clock__ __?A do you B do I C do they D will they
I don't believe they'll arrive before five o'clock__ __?
A do you B do I C do they D will they

I don't believe they'll arrive before five o'clock__ __?A do you B do I C do they D will they
D
I don't believe此类的反问,反问分句,但是肯否根据主句来确定.

D
这类题属于否定前移，就是将从句的否定移到主句来，如think,believe