Which of the following choices is grammatically similar to the underlined part of the following sentence?
Did these prejudices prevail only among the meanest and lowest of the people, perhaps they might be excused.

A．Had I known the killer escaped, I would not have gone for a walk in the woods.
B．Did they prejudice against the black candidate during the election?
C．They did prevail, and they were immediately ready to reap the benefits of that victory.
D．We did prevail, the legal fees probably would exceed the damages we might reasonably expect to recover.