GWD-28-7<---ethyl更改标题（GWD 28-7 好像还没有标准答案，大家选啥？）

howardwang

我觉得C应该是正确选项。

OPEN TO DISGUSS

howardwang

结论是it is not likely that, for any species of monkey, crowding increases aggression as significantly as was seen in rats.

其中，any species 是个绝对化的概念，没有C，Rhesus monkeys 无法代表any species 。

所以，我认为只有C是正确的。