GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - L577_P140I7IEE_GJ

In the context of the passage as a whole, the highlighted portion serves primarily to A. present the thinking that led scientists to qualify a widely accepted view B. describe the basis on which a hypothesis was advanced C. illustrate the kind of reasoning that is applied in a branch of science D. explain how a hypothesis can be tested empirically E. relate the analysis that refined a tentative explanation