In FTC V Indiana Federation of Dentists, a Dentists' Organization Required Its

In FTC v. Indiana Federation of Dentists, a dentists' organization required its members to withhold x-rays from insurance companies. The Supreme Court held this rule:

A) justified for medical privacy, and so legal
B) legal for a profession such as dentistry, which is regulated by the state, to withhold x-rays
C) illegal based on a rule of reason analysis
D) illegal based on a per se analysis
E) legal, only because the FTC cannot sue dentists or other medical professionals