Which of the following statements about primary co...

Câu hỏi: Which of the following statements about primary cooperation is supported by information in the passage?

A. It is usually the first stage of cooperation achieved by a group of individuals attempting to cooperate.

B. It is most commonly seen among people who have not yet developed reading and writing skills.

C. It is an ideal that can never be achieved.

D. It was confined to prehistoric times.