GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 2J5CC7V4A1Q24D54J

The primary purpose of the passage is to A. present a scientific theory that challenges a widely held theory B. summarize the basis for a large body of scientific research C. defend an established scientific theory in light of recent criticism D. express skepticism about the results obtained by a particular researcher E. compare the results of two particular scientific studies