GRE Reading Comprehension: JiJing 352-GRE阅读机经352篇 - Q8R62P105PR3GI5AJ

It can be inferred that for Kaminski et al. the examples highlighted were meant to A. explore the range of gestures that chimpanzees have been known to use B. illustrate the communicative situations in which chimpanzees tend to be most comfortable C. examine the possibility that chimpanzees might become confused under certain experimental situations D. provide a range of communicative conditions similar to those likely experienced by chimpanzees E. illustrate how chimpanzee gesturing changes according to the species of the recipient