As Illustrated in State Oil Co

As illustrated in State Oil Co. v. Khan, where a gasoline distributor controlled the maximum gas sales markup that its gas station dealers could charge (maximum price fixing) , the Supreme Court has held that:

A) vertical price fixing is always legal
B) vertical price fixing is never legal
C) vertical price fixing is acceptable per se if it benefits the industry
D) vertical price fixing is acceptable under the rule of reason if it benefits industry
E) none of the other choices are correct