Which department investigates unfair business practices in the U.S.?

The Department of Justice (DOJ) is responsible for investigating unfair business practices in the U.S. This includes a variety of actions that can harm competition, such as anti-competitive behavior and violations of antitrust laws. The DOJ's Antitrust Division specifically focuses on enforcing laws that promote fair competition and prevent monopolistic practices. By investigating and, when necessary, prosecuting cases of unfair business competition, the DOJ plays a crucial role in maintaining a balanced marketplace that promotes innovation and benefits consumers.

The other departments listed do not hold the primary responsibility for investigating unfair business practices. The Department of Labor focuses on labor-related issues and workers' rights, the Department of Commerce deals with economic growth and trade, and the Department of Treasury manages the government's finances and economic policy. Each of these departments has distinct functions that do not encompass the investigation of unfair business practices in the same way that the DOJ does.