Sean Is Studying a Group of Female High Schoolers to Test

Sean is studying a group of female high schoolers to test the relationship between changing schools during high school and adolescents' grades.Once he confirms that changing schools is associated with lower grades on average,he decides to include a measure of the resources in both the old and new schools to see if it interacts with the effect of moving schools on grades.Sean has decided to analyze the data in this way because he wants to test whether

A) being female is a mediator.
B) being female is a moderator.
C) school resources are a mediator.
D) school resources are a moderator.