Jessie Has Had a Long-Term Phobia of Heights

Jessie has had a long-term phobia of heights.After working with a therapist,he is finally able to stand on the edge of a high overpass for the first time in his life,primarily because he no longer feels the strong anxiety and fear that he used to experience during times like these.This example best demonstrates how ______________ can enhance feelings of self-efficacy.

A) observational learning
B) emotional arousal
C) previous performance attainments
D) verbal persuasion