Why Was the Supreme Court's Decision in Ricci V

Why was the Supreme Court's decision in Ricci v.DeStefano important?

A) It overturned a prior decision by Elena Kagan,who,a few months later,joined the Supreme Court.
B) It held that employment tests for promotion could not discriminate based on gender or race.
C) It held that,in order to seek damages,employees must show that employment tests for promotion are clearly defective,rather than that they produce unequal outcomes based on race or gender.
D) It held that,in order to seek damages,employees must show that employment tests for promotion clearly create unequal outcomes based on race or gender.
E) It held that employment tests for promotion were allowed to discriminate based on gender or race if the employer could show that the position would be better performed by a person with a particular race or gender.