问题详情

According to the professor, why are putty-nosed monkeys not afraid of eagles？
A．The Diana monkeys warn them so that they can run away in time.
B．Eagles do not like to eat putty-nosed monkeys.
C．The putty-nosed monkeys are too close to the group to attack easily.
D．The eagles are not strong enough to injure the putty-nosed monkeys.请帮忙给出正确答案和分析，谢谢！