What is the biggest difference in who controls the 401(k) and IRA retirement plans? a. IRA is intended for a stable retirement income, while a 401(k) is reserved for emergencies or luxuries. b. 401(k) is a good last minute investment for retirement, while IRAs require years of investing. c. IRAs allow one to save a lot more money towards retirement than a 401(k). d. A 401(k) is controlled and monitored by an employer, and an IRA is controlled by the investing individual. Please select the best answer from the choices provided