GRE Reading Comprehension: OG/PP2-GRE阅读OG/PP2 - 5LV7T6UVKK441W2DP

In the final paragraph of the passage, the author is concerned primarily with A. answering a question about Earth's climatic history B. pointing out a potential flaw in Bond's hypothesis C. suggesting a new focus for the study of ocean sediments D. tracing the general history of Earth's climate E. discussing possible implications of Bond's hypothesis