单选题
A computer engineer repaired the network system in a supermarket on November 14 and sent the bill to the supermarket on December 2. If both the engineer and the supermarket prepare financial statement under the accrual method on November 30, how will they each record the transaction?
computer engineer supermarket
① accrued revenue accrued expense
② accrued revenue prepaid expense
③ unearned revenue accrued expense