28.. At December 31, 2020, Mongo, Inc. reported in its balance sheet a net loss of $3 million related to its pension plan. The actuary for Mongo at the end of 2021 increased her estimate of future salary levels. Mongo's entry to record the effect of this change will include:

A. A debit to lossOCI and a credit to PBO.

B. A debit to PBO and a credit to lossOCI.

C. A debit to pension expense and a credit to PBO.

D. A debit to pension expense and a credit to lossOCI.