Karr Corporation received cash of $7,200 on August 1, 20x8 for one year's rent in advance and recorded the transaction with a credit to Rent Revenue The December 31, 20x8 adjusting entry is Select one: a. Debit Rent Revenue and credit Unearned Rent, $4,200 o b. Debit Unearned Rent and credit Rent Revenue, $4,200 c. Debit Unearned Rent and credit Rent Revenue, $3,000 d. Debit Rent Revenue and credit Unearned Rent, $3,000