The lack of support for the predictive models of prejudice and discrimination (final paragraph)

The lack of support for the predictive models of prejudice and discrimination (final paragraph) is best explained by which statement?
A.Additional risk factors, such as social capital, might confound the relationship between prejudice and sensitivity to stress.
B.Discrimination may be more significant than prejudice as a psychosocial stressor that contributes to alcohol use disorders.
C.Unmeasured protective factors, such as social support, might reduce the impact of discrimination on alcohol consumption.
D.Discrimination may be less significant than prejudice as a psychosocial stressor experienced by some minority groups.