Carmella Finds a Correlation of +0

Carmella finds a correlation of +0.47 between self-esteem and academic achievement. Which of the following is the MOST appropriate interpretation of this correlation?

A) High self-esteem motivates students to achieve more academically.
B) Doing well academically increases students' self-esteem.
C) The higher students' self-esteem, the greater their academic achievement.
D) As self-esteem increases, academic achievement decreases.