It really would be helpful in further questions to give some context on what it wants. I know it wants you to conjugate something, but without the verb, it's difficult to see what it wants.
One that would probably work is "the bus will be clear at game time"
D. The inference is supported by the excitement the men feel when they discover that the message was sent by Zimmermann, the German foreign secretary.
Answer:
The best rebuttal for the counterclaim is:
C. However, most marching band members also get a great amount of exercise and establish lifelong friendships.
Explanation:
If we are to choose a rebuttal, that means we are going to choose something that contradicts the counterclaim, that tries to prove it wrong. According to the counterclaim, some people say that marching bands have only one benefit: to teach students how to play an instrument. If we wish to contradict that, we need to choose the option which says there are more benefits than just that one, and which lists at least a couple of those benefits. That is precisely what letter C does. It argues that, besides teaching them how to play an instrument, marching bands also help students exercise and make friends. Therefore, letter C is the best option.