She could not believe that such a violent (or vile) act would be committed.
It's not A because that is irrelevant. It's not D because that is also irrelevant. That leaves us with C or B. I would say that it is B, because it is relevant to what is in the rest of the paragraph.
C.<span>We will be so happy when they open the gift.
Hope this helps you!!! =')</span>
I think is B.
simple predicate is the main verb in the predicate that's tells what the subject does.
