Unearned service revenue has a balance that is $2,800 less in the worksheet's balance sheet credit column than in the worksheet's trial balance credit column. From this data, it can be determined that:

A) unearned service revenue was credited for $2,800 in the adjustments columns.

B) service revenue was debited for $2,800 in the adjustments columns.

C) service revenue was credited for $2,800 in the adjustments columns.

D) unearned service revenue was credited for $2,800 in the adjusted trial balance columns