Cooperation among oligopolies runs counter to the public interest because it leads to underproduction and high prices. In an effort to bring resource allocation closer to the social optimum, public officials attempt to force oligopolies to compete instead of cooperating.Consider the following scenario:Suppose that two major U.S. insurance corporations negotiate a merger agreement so that a financial crisis is less likely to cause either firm to face bankruptcy.

This merger could potentially be stopped by a lawsuit brought by which of the following American institutions?