When you look at the data about all of the children in your setting, you can learn a. about child development. b. how well each individual child is performing. c. what outside factors you need to change. d. how effective your instruction and environment are.

All of above

Explanation:

Firstly, the kind of data that is provided to you determines what kind of information you can extract from it because of the determinants it is covering. A good set of data shows us how each child is developing and what are the external or internal factors that are inhibiting or enhancing his growth.

This is a way of knowing what needs changing around them. It can also tell us how effective the mode of instruction and the environment around them is.