Answer: Attribution.
Step-by-step explanation:
Attribution is the act whereby we tend to infer the reasons of events or why individuals or ourselves behave the way we or they do.
Here, Nina and Erin tried to infer the reasons why the girls athletic coach sold steroids to athletes, while Erin inferred, that the guy was into drugs addition, Nina conclude his action to poor wages received by teachers, their ideas were based on Attribution.