Which of the Following Situations Does Not Require an Adjusting

Which of the following situations does not require an adjusting entry at the end of January?

A) On January 1, Empire Company purchased delivery equipment with an estimated useful life of five years.
B) On January 1, Empire Company began delivery service for a large client who will pay at the end of a three-month period.
C) At the end of January, Empire Company pays the custodian for January office cleaning services.
D) On January 1, Empire Company paid rent for six months on its office building.