I believe the correct answer is - A counterclaim is an opposing idea or opinion.
In an argument, or a debate, the first speaker is going to say what he or she thinks, and then you can present your own rebuttal. This rebuttal is formally known as a counterclaim - if you don't agree with the first speaker's ideas, you can present your own, which are usually opposing.
I think the answer to this question is D To Kill a Mockingbird is the best book because the theme of injustice is still current.
I did this on apex few years back, if i remember correctly the answer was B.
Sloppy is the answer, i think. correct me if im wrong:)