If One Were to Compare a Competitive Market to a Monopoly

Multiple Choice

If one were to compare a competitive market to a monopoly that engages in perfect price discrimination,what could one say

A) In both cases, total social welfare is the same.
B) Total social welfare is maximized in the competitive market, but not in the perfectly discriminating monopoly.
C) In both cases, some potentially mutually beneficial trades do not occur.
D) Consumer surplus is the same in both cases.