The passage suggests that which one of the following is true of Sanders' hypothesis? A. He underestimated the effects of winter and glaciation in the Amazon basin on the tropical rain forest. B. He failed to recognize the similarity in physical conditions of the Amazon lowlands and the Amazon uplands. C. He failed to take into a count the relatively high rate of extinction during the ice ages in the Amazon basin. D. He overestimated the length of time that species have survived in the Amazon basin. E. He failed to account for the distribution of species in the Amazon basin.