Of the following, which would describe a likely causal-comparative study?

Relationship between teacher job satisfation and year of teaching.

A)Typical management procedures used by experienced teachers in a child-care setting.

B) Differences in problem solving performance between children provided some exposure to a computer program and those who are not given the same exposure.

C)Differences in acclimation to high school between children from small and large middle schools.

D) Differences in accllimation to high school between children from small and large middle schools.

I think it is C, but I am not 100%