A Difference Between a Perfectly Competitive Market Equilibrium and a Perfect

A difference between a perfectly competitive market equilibrium and a perfect price discrimination equilibrium is that in a competitive market ________,whereas in perfect price discrimination ________.

A) all units are sold where p=MC; only the last unit sold is at p=MC
B) deadweight loss is minimized; deadweight loss increases
C) consumers are better off; producers lose some sales due to high prices.
D) All of the above.