Final answer:
Personal beliefs predict attitudes towards the least prejudiced group, while social norms predict attitudes towards the most prejudiced group.
Correct option is a.
Step-by-step explanation:
The research conducted by Haddock, Zanna, and Esses (1993, 1994) found that for the group toward which participants were least prejudiced, personal beliefs were the best predictor of attitudes. On the other hand, for the groups toward which participants were most prejudiced, social norms were found to be the best predictor of attitudes.
This suggests that our own personal beliefs play a stronger role in shaping our attitudes towards groups we have less prejudice against, while social norms have a stronger influence on attitudes towards groups we have more prejudice against.