I would say C. “was”. It’s definitely not “am”, because that just sounds completely wrong. It’s not “are” because that sounds a bit wrong, too. It can’t be “were” because it’s only referring to one group, not many groups. The only answer it could be is C.
Take key points and use them in the new speech. Make it short and sweet. Also don't use "big" words. Use words kids can/will understand, or be prepared to define them, explain them, and give an example.
