I think it's D. Just think about it, use the process of elimination.
Answer:
[3] As a team, we've tried to make a schedule that allows her to study, prepare, and scrimmage.
[6] Our first debate is on October 10th, and each of us are looking forward to it.
Explanation:
The two sentences above have simple grammatical errors, which may even go unnoticed. However, it is important to recognize these mistakes and avoid them.
First, it is incorrect to use a comma before the word "and", as seen in the first sentence. There are times when this comma is acceptable, but this is not one of them.
In the second sentence, the correct thing would be to write "each of us is looking forward to it."
