Question 50 The projected benefit obligation (PBO) is best described as which of the following? explain why other options are being incorrect? a. Present value of benefits accrued to date based on future salary levels. b. Present value of benefits accrued to date based on current salary levels. C. Increase in retroactive benefits at the date of the amendment of the plan. d. Amount of the adjustment necessary to reflect the difference between actual and estimated actuarial returns