This exemplifies the "self serving bias".
A self-serving bias is any intellectual or perceptual process that is misshaped by the need to keep up and improve confidence, or the propensity to see oneself out of an excessively great manner. It is the conviction that people have a tendency to attribute accomplishment to their own capacities and endeavors, yet credit inability to outer factors.
Answer:
D. There is a correlation between weight and classroom performance.
Explanation:
Students who weight more are more likely to live in a family which possess abundant resources. This mean that Weight could be an indicator of proper nutrition and wealth.
Growing up in a house with more wealth and proper nutrition will enhance the brain's performance and expose the students with additional learning activities outside school that could make the result of their study become better.