5. Marleen is a 52-year old participant in the XYZ cash balance plan. She has been a participant in the plan for the last twenty years. XYZ, which has over 10,000 employees, is having financial difficulty and Marleen is concerned about the security of her pension. Which of the following is correct? a. The cash balance plan assets may include up to 25% of XYZ stock. False b. The cash balance plan formula cannot be lowered in the future for current participants, but could be changed for new participants False c. The cash balance plan and its benefits are fully protected by the PBGC. - benefits are insured by the Pension Benefit Guaranty Corporation to their maximum monthly benefit limits d. Termination of the new plan may affect vesting for some employees, but Marleen's vesting will not be impacted. False