问题详情

Which of the following is true？
A．When a child is two years old, he prefers to use both of his hands to grasp objects.
B．Scientists have given the reason for this tendency.
C．A monkey can use both of his hands equally well.
D．Those who prefer to use their left hands live a difficult life.请帮忙给出正确答案和分析，谢谢！