After Muzafer Sherif and His Associates Had Arbitrarily Divided Boys

Multiple Choice

After Muzafer Sherif and his associates had arbitrarily divided boys in a summer camp into two groups, they found that intergroup hostility could be created by providing ________ and reduced by providing ________.

A) competitive activities; cooperative activities
B) more intergroup contact; less intergroup contact
C) negative stereotypes; positive stereotypes
D) oversufficient rewards; insufficient rewards