Answer:
C) respond to bigger counterclaims instead of smaller ones
Step-by-step explanation:
If you focus on proving wrong the biggest counterclaims it will be easy for you to discourage your opponents and to persuade them to adopt your posture. In the other hand if you get tangled with the little details that can counterclaim your argument the whole argument can be reduced to those little details, so you are better off discussing the big counterclaims.