The following information relates to the defined benefit pension plan of Company X during 2022: Fair value of plan assets, beginning of year $ 500 million Expected return on plan assets 9% Actual return on plan assets 8% Contributions to the pension plan 50 million Amortization of loss on plan 8 million Benefits paid to retirees 16 million Pension expense for the year 56 million Determine the amount of pension plan assets at fair value on December 31, 2022. A. $518 million B. $574 million C. $579 million D. Some other amount