Unique Feature of the Robinson-Patman Act Is That It Allows

unique feature of the Robinson-Patman Act is that it allows for price differentials to different customers under several conditions.Which of the following practices would be permitted?

A) Using price differentials when price differences are given on the basis of other family businesses.
B) Using price differentials when charging different prices to different buyers for goods of like grade or quality.
C) When price differences are quoted to selected buyers in good faith to meet competitors' prices and are not intended to injure competition.
D) Using price differentials when charging different prices on the basis of religious affiliation.
E) Using price differentials when charging the original price for refurbished goods that have been damaged or used and returned but repaired according to company specifications.