One of Its Least Favorite Actions,Amazon

one of its least favorite actions,Amazon.com was caught fiddling with its price tags.Avid DVD buyers,buying in quantity for resale,found that the online retailer was offering different customers different prices for the same DVD,and complained vociferously.Amazon was caught red-handed.Company officials admitted that the company was trying to see how much it could charge for an item before buyers balked.No matter what the reasoning behind it,Amazon.com was using

A) horizontal price-fixing.
B) price discrimination.
C) resale price maintenance.
D) predatory pricing.
E) bait and switch pricing.