TOEFL Reading: ETS-TOEFL阅读机经 - 1G682FTR56PYF55WL$

In paragraph 5, the author discusses pottery in the American Southwest in order to A. emphasize that ceramics are usually the only means of reconstructing the diet and economic activity of prehistoric peoples. B. argue that changes in the style of pottery are usually a result of changes in food preparation. C. explain why certain types of prehistoric pottery have been able to survive better than others. D. support the claim that ceramics provide important dining and economical information about their users.