What Did the Supreme Court Say About the Use of Tests

What did the Supreme Court say about the use of tests in Griggs v.Duke Power?

A) Tests are legal for selection if used for only entry-level jobs; they are not valid for internal candidates
B) Tests are always illegal if they result in adverse impact, regardless of how performance is related to test results
C) Personality tests cannot be used for selection if they are administered pre-offer
D) Job -relatedness can be an affirmative defense if the test is valid, regardless of adverse impact