What Was the Ruling in the Case of Griggs V

What was the ruling in the case of Griggs v. Duke Power Company?

A) That preferential treatment had been granted to blacks solely on the basis of race
B) That racial quotas as a means of reversing past discrimination were permissible
C) Leave policies that favor pregnant women may not be discriminatory
D) That the use of a professionally developed examination could not be used if it had a discriminatory effect