In the Context of Proof of Pretext,which of the Following

In the context of proof of pretext,which of the following statements is true?

A) Proof of pretext is not required if an employer had a financial reason behind discriminating against an employee based on age.
B) Proof of pretext is only required if an employee being discriminated against is younger than 40.
C) Where there is direct evidence of discrimination, proof of pretext is not required.
D) Where an employer presents conflicting rationales for the adverse employment action, an employee cannot show that pretext exists.