GRE Reading Comprehension: PPO-GRE阅读PPO - TQMON3C9O8I8J_Y9R

The passage implies that Morgan's suggestion was A. presented as a challenge to a newly accepted theory B. made on the basis of considerations that have since been questioned C. rejected despite its success in explaining the phenomena it was intended to explain D. supplanted by a theory that was more general in scope E. intended to account for observations that appeared to contradict an accepted theory