All these sentences look right to me. Which is incorrect?

Question

Identify the incorrect sentence.
A. The jury has been deliberating for the past three hours.
B. Members of the jury have been deliberating for the past three hours.
C. The jury is arguing over the evidence.
D. Members of the jury are arguing over the evidence.

Answer 1

I agree with you. I think they are all correct. But check back here as other English teachers may have a different opinion.

Answer 2

I don't see anything wrong with any of these sentences either.

The only thing MIGHT be the sense in #3. Can a singular anything/anybody argue over something?

That's only a guess, but grammatically, I think all four are correct.

Answer 3

I'll be the sacrifice and choose C then. I will report back tomorrow to let you all know if I got the question wrong.

Answer 4

#3 was the correct answer for my test. I thought they all looked correct, too!