GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - 1MPX23NJM0Q47065J

The author of the passage is primarily concerned with A. advancing a new methodology for changing a monkey's social behavior B. comparing the methods of several research studies on aggression among monkeys C. explaining the reasons for researchers' interest in monkeys' social behavior D. discussing the development of investigators' theories about aggression among monkeys E. examining the effects of competition on monkeys' social behavior