TOEFL Reading: ETS-TOEFL阅读机经 - 721LC041HCQ018SLL$

According to paragraph 3, which of the following was the cause of the collapse of the Mimbres society? A. They could not overcome the stress of moving to a new area with each change in the climate. B. The flooding of their farmland during a wet climate phase prevented them from growing enough to feed their population. C. A decline in population during dry periods prevented them from expanding their farming into nearby areas. D. Their population became too large to survive when the climate entered a dry period.