29. Dell computer mistakenly marked its computers at a much lower price twice (June & July) in 2009 which attracted lots of consumers to place orders; however, Dell only offered coupons as a compensation to the customers who placed orders but refused to sell the computer at the marked price. Dell computer may be accused for _______ in this whole event.
(A) price discrimination
(B) price fixing
(C) deceptive pricing
(D) predatory pricing
(E) marketskimming pricing