Is It a Valid Defense for a Seller to Engage

Multiple Choice

Is it a valid defense for a seller to engage in price discrimination in order to compete in good faith with another seller's low price?

A) Yes,that is a valid defense to price discrimination called the legitimate-price-discrimination defense.
B) No,that is not a defense,and the seller has violated the Clayton Act.
C) Yes,that is a valid defense to price discrimination called the meeting-the-competition defense.
D) No,that is not a defense,and the seller has violated the Sherman Act.
E) Yes,that is a valid defense to price discrimination called the meet-the-offense defense.