The "Colgate Doctrine" Is

The "Colgate Doctrine" is:

A) The legal basis for the American Dental Association's endorsement of toothpastes.
B) The common term for state level "fair trade laws".
C) The legal basis for sellers to use their own criteria and judgment in selecting channel members
D) The legal basis for manufacturers retaining some customers as "house accounts".
E) Allows the practice of price maintenance in the marketing channel.