McCloud Realty received a cheque for $21,000 on July 1, which represents a 6-month advance payment of rent on a building it rents to a client. Unearned Revenue was credited for the full $21,000. Financial statements will be prepared on July 31. McCloud Realty should make the following adjusting entry on July 31:

Select one:

a.debit Cash, $3,500; credit Rent Revenue, $3,500.

b.debit Unearned Revenue, $3,500; credit Rent Revenue, $3,500.

c.debit Unearned Revenue, $21,000; credit Rent Revenue, $21,000.

d.debit Rent Revenue, $3,500; credit Unearned Revenue, $3,500.