A firm is applying international accounting standards to its defined-benefit pension plan. At the end of the current year, the actuary informs the firm that the plan has experienced an actuarial gain of $2mn. The average remaining service period of plan participants is ten years. Therefore,

A. Defined-benefit obligation does not reflect the decrease of $2mn immediately.
B. Pension expense will be reduced by $200,000 the following year.
C. Other comprehensive income is immediately increased.
D. The unrecognized net gain or loss account is immediately debited.