GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 87JVW7O9W44L6PTCJ

The author mentions "studies of lake and shallow ocean sediments" primarily in order to A. describe the results of a novel study B. identify the source of evidence that suggested a hypothesis C. undermine a conventional explanation D. highlight the importance of one type of evidence E. clarify the value of a particular undertaking