Which agency is responsible for regulating communications in the United States?

The Federal Communications Commission (FCC) is the agency responsible for regulating communications in the United States. It manages a broad range of communication sectors, including radio, television, wire, satellite, and cable. The FCC's role is crucial for ensuring that these communication systems operate effectively and fairly, maintaining competitive practices and protecting consumer rights.

The agency's responsibilities include licensing broadcasters, enacting regulations regarding content, and overseeing the use of the electromagnetic spectrum. It plays a significant role in shaping public policy related to telecommunications and ensuring compliance with federal laws.

In contrast, the other organizations listed focus on different areas: the National Association of Broadcasters is a trade association representing television and radio broadcasters, the Federal Trade Commission deals primarily with consumer protection and antitrust matters, and the Department of Justice enforces the law and defends the interests of the United States. Each has its distinct function that does not involve the regulation of communications in the same way the FCC does.