Which of the following statements about 401(k) plans are true? L. They are defined benefit plans II. They allow employer and employee contributions. II. Earnings accrue tax-free during the employee's working years. IV. They allow employer discretion in asset allocation. V. They always have minimum guaranteed rates of return. II, III, and IV only I, IV, and only II and Ill only I, II, and only All of these choices are correct