Choose the most complete and correct statement. Select one: a. The Prudential Regulation Authority is responsible for regulation and supervision of financial services firms and focuses on the regulation of conduct by both retail and wholesale financial services firms. b. The Prudential Regulation Authority is responsible for the regulation and supervision of banks. The Prudential Regulation Authority is responsible for regulation and supervision of banks, building societies, credit unions, insurers and major investment firms. d. The Financial Conduct Authority supervises financial institutions at the level of the individual firm