What Was the Main Purpose of the Race-Evolution Theory

What was the main purpose of the race-evolution theory?

A) to prove that whites were indeed superior because of their skin color and genetic makeup
B) to provide a rational explanation of the unequal distribution of wealth and political power among racial groups
C) to alert African-Americans to the need to demand their political rights, civil rights, and higher Education
D) both to prove that whites were indeed superior because of their skin color and genetic makeup, and to provide a rational explanation of the unequal distribution of wealth and political power among racial groups