A-A+
According to the passage early humans ______.
问题详情
According to the passage, early humans ______.
A．were less selfish than the present-day people
B．were more co-operative in nature
C．had to be co-operative to survive
D．had to behave better than the present-day people
参考答案
正确答案：C
解析：本题是细节题，我们可从原文中找到对应：For social groups to work，individuals had to co-operate，rather than act selfishly．其他选项均不符合文意。
