A city has an internal service fund that it used for maintenance on city-owned vehicles. An average vehicle repairs costs 1,000, which is transferred to the service fund from the general fund 30 days after repairs are completed. The service fund completes maintenance on a city truck on December 31, 2021.

How should the service fund report the repair in its 12/31 fund statements?

A As revenue

B as other financing sources

C as deferred revenue

D as unearned revenue