In 1973, Congress Established the Economics Section of the Department

In 1973, Congress established the Economics Section of the Department of Justice's Antitrust Division. How did antitrust policy change?

A) For the first time horizontal mergers were allowed-with government approval-and vertical mergers were allowed without need for approval from the government.
B) For the first time concentration ratios were used to evaluate the degree of competition in the industries of firms that proposed mergers.
C) The economists who work in this division began evaluate the economic consequences of proposed mergers.
D) Proposed mergers no longer needed the approval of the Federal Trade Commission or the court system.