Which of the Following Are the Four Major Factors That

Which of the following are the four major factors that may undermine the ability of the invisible hand to produce market efficiency?

A) externalities, private goods, poorly informed buyers or sellers, lack of competition
B) public goods, externalities, lack of competition, poorly informed buyers or sellers
C) competition, poorly informed buyers or sellers, externalities, public goods
D) public goods, lack of competition, well-informed buyers and sellers, externalities