Answer: B. The "superior" group was encouraged and praised for their intelligence.
E. The "inferior" group was given fewer opportunities to learn compared to the "superior" group.
Explanation:
The two statements that best explain why the "superior" group performed better in school than the "inferior" group were:
• The "superior" group was encouraged and praised for their intelligence.
• The "inferior" group was given fewer opportunities to learn compared to the "superior" group.
The above situations helped the superior students perform better.