TOEFL Listening: TPO-TOEFL阅读TPO - L8L7CQK205B55C57N$

According to paragraphs 2 and 3, all of the following are true of Population I stars EXCEPT A. They contain material that was once contained in Population II stars. B. In terms of their mass, they consist primarily of hydrogen and helium. C. They contain elements that were formed through the fusion of lighter ones. D. They generally do not last as long as Population II stars.