Compared to European-American Children,how Have African-American Children Historically Scored on Standardized

Compared to European-American children,how have African-American children historically scored on standardized IQ tests?

A) African-American children score an average of 15 points higher than European- American children.
B) African-American children score an average of 15 points lower than European- American children.
C) African-American children score an average of 25 points lower than European- American children.
D) African-American children show no different in scores compared to European-American children.