A researcher who described a peaceful reunion between normally adversarial chimpanzees as a ______ was criticized for inferring human motives.
 
【正确答案】 A
【答案解析】 名词词义辨析。根据句意，空格应填入与inferring human motives(推断人类动机)和a peaceful reunion(和平的重新联合)语义相同的词。选项中，truce“停战”；competition“竞争”；mischance“不幸”；coincidence“一致，巧合”。故答案为A。