In the following groups, one statement is the general point, and the other statements are specific support for the point. Choose the letter of the general idea.

A. When toddlers play, they are having fun, but they are also developing in important ways.
B. During play, young children are learning to use their muacles and becoming more coordinate.
Children pretending to be other people are exploring their identities and "trying on" other ones.
D. By making up stories and acting them out, children are learning about emotions and feelings.