单项选择题
A．the difference between children and adults B．the different stages of the development of children C．how to dress children D．the slow development of the mind of a child
A．Many adults don' t talk clearly to their children. B．The development of a child' s mind is as obvious as that of his body. C．Now there are no children who act like children. D．A small child can not understand tile difference between the present and future.