The US Securities and Exchange Commission Has Designated Just Nine Credit-Rating

The U.S. Securities and Exchange Commission has designated just nine credit-rating agencies as nationally recognized statistical rating organizations, which include Moody's, Standard & Poor's, and Fitch Ratings. These agencies provide opinions on the creditworthiness of other entities and the financial obligations issued by them. Because so few companies can compete in it, the credit-rating industry would be considered

A) a mega monopoly.
B) an oligopoly.
C) a pure competition.
D) a monopolistic competition.
E) a pure monopoly.