In Leegin Creative Leather Products V

In Leegin Creative Leather Products v. PSKS, a maker of leather goods would not sell to stores that would not follow its pricing policy (resale price maintenance) . The Supreme Court held that:

A) resale price maintenance is always illegal as stated in Dr. Miles Medical Co. v. John D. Park & Sons
B) resale price maintenance can help promote intrabrand competition, which is the primary purpose of the antitrust laws
C) vertical price fixing can help promote intrabrand competition, which is the primary purpose of the antitrust laws
D) horizontal price fixing can help promote interbrand competition, which is the primary purpose of the antitrust laws
E) none of the other choices are correct