How Is Academic Self-Concept Related to Children's School Performance

How is academic self-concept related to children's school performance?

A) Academic self-concept has an impact on the academic performance of less competent students, but not on the performance of good students.
B) Good students who have low academic self-concepts are less motivated to try new tasks and less likely to persist on challenging tasks.
C) Academic self-concept is unrelated to actual school performance.
D) Good students always have high academic self-concepts while less competent students always have low academic self-concepts.