Gerald Clore Set Up a Summer Camp for Children Directed

Gerald Clore set up a summer camp for children directed by a European-American male and female and an African-American male and female with each campsite having three African-American and three European-American campers and one African-American and one European-American counselor.Regarding the children's attitudes toward the opposite-race after this camp experience,testing showed that the attitudes

A) did not change for either group of children after the camp experience.
B) of the African-American children became slightly more positive, while the attitudes of the European-American children became slightly more negative.
C) of the African-American children became slightly more negative, while the attitudes of the European-American children become slightly more positive.
D) were significantly more positive toward opposite-race children in both groups after the camp experience.