Regarding the Relationship of Mental Ability to Race, It Has

Multiple Choice

Regarding the relationship of mental ability to race, it has been proven that

A) blacks are genetically inferior to whites in measured ability.
B) the mean score of blacks is usually lower than that of whites on intelligence tests that have not been culturally adjusted.
C) lower IQs in blacks and whites are due to heredity.
D) lower IQs in blacks and whites are due to environment.