2. Which of the following is a principal feature of ERISA? (a) All employees must be vested in the company pension plan by the end of 7 years. (b) Employees must keep their pension plan with their old employer if they change jobs. (c) The pension plan is insured against bad investments by the Pension Benefit Guarantee Corporation (Penny Benny). Individual employees must pay a premium to have their account insured by Penny Benny. (d)