Discriminating in Price Between Different Purchasers of the Same Goods

Discriminating in price between different purchasers of the same goods, when the effect is to injure competition, was made:

A) an illegal resale of services by the Supreme Court in Texaco v. Hasbrouck
B) illegal by the Supreme Court in the Brooke Group case
C) legal by the FTC Act
D) legal by the Supreme Court in the Brooke Group case
E) none of the other choices