To maintain effective levels of competition in as many markets as possible, the government enforces .

The correct answer is antitrust laws.

Explanation:

Often referred to as competition laws, antitrust laws are statutes enacted by the U.S. government to protect customers from abusive business practices. These laws ensure that in an open-market economy there is fair competition. Along with the economy, these laws have evolved, protecting it against prospective monopolies and threats to the productive ebb and competition stream.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.