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.
Answer:
plays and sings both are function
Sentence 1 both sentences
Help and advice - start by bullet pointing the information, you will then find that putting your points together will make a good paragraph!
Among those sentences only the last one has a verb modified by an adverb:the verb is "hid" and the adverb is "quickly". In fact there are no other adverbs in those sentences.