In Terms of Explaining Why Exercise Improves Mental Health,one Idea

In terms of explaining why exercise improves mental health,one idea is that as a person engages in exercise and experiences fitness gains or bodily changes, .

A) self- efficacy remains the same but self- esteem increases
B) personality changes and results in enhanced mood
C) self- efficacy for the exercise increases,and the person experiences a feeling of accomplishment
D) self- awareness increases