Which of the Following Has Been Demonstrated in Research on Self-Efficacy

Which of the following has been demonstrated in research on self-efficacy?

A) Individuals who have high self-efficacy with respect to coping with stress are likely to give up more quickly in the face of failure.
B) Individuals who have high self-efficacy tend to have higher self-esteem.
C) Individuals who have high self-efficacy with respect to coping with stress exhibit enhanced immune system functioning.
D) Individuals who have high self-efficacy with respect to coping with stress may try harder to cope, but they are no more likely to succeed.