<Li> The Commodity Futures Trading Commission (CFTC) regulates commodity futures and option markets in the United States . The agency protects market participants against manipulation, abusive trade practices, and fraud . Through oversight and regulation, the CFTC enables the markets to serve better their important functions in the US economy, providing a mechanism for price discovery and a means of offsetting price risk . </Li> <Li> The Consumer Financial Protection Bureau (CFPB) is responsible for consumer protection in the financial sector . Its jurisdiction includes banks, credit unions, securities firms, payday lenders, mortgage - servicing operations, foreclosure relief services, debt collectors, other financial companies in the United States . </Li> <Li> The Environmental Protection Agency (EPA) works with state and local governments throughout the United States to control and abate environmental pollution and to address problems related to solid waste, pesticides, radiation, and toxic substances . The EPA sets and enforces standards for air, soil and water quality, evaluates the impact of pesticides and chemical substances, and manages the Superfund program for cleaning toxic waste sites . </Li> <Li> The Federal Communications Commission (FCC) is charged with regulating interstate and international communications by radio, television, wire, satellite, and cable . It licenses radio and television broadcast stations, assigns radio frequencies, and enforces regulations designed to ensure that cable rates are reasonable . The FCC regulates common carriers, such as telephone and telegraph companies, as well as wireless telecommunications service providers . </Li>

How many different agencies are listed under the heading congressional support agencies