As Molly looks at the grade scored in her final exams, she thinks, "I did well on this exam, because my roommate helped me study." Molly's thoughts suggest that she has

External locus of control

Explanation:

People who have an external locus of control believe that their failures or successes are the results of external factors that are outside of their direct control.

Molly has a external locus of control because she believes that main reason she did well in her final exams was the help of his roomate. If she had an internal locus of control instead, Molly would think that the main reason was her intelligence, or skills, or discipline, etc.

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