Answer:
C
Debit cash , Credit unearned rent
Explanation:
This is a transaction that affects cash and unearned revenue account as the rent is not yet earned as being paid in advance. In other to avoid overstatement of income as the accrual system specify that income should be recorded when earned , the transaction is recorded in the unearned account.
An increase in the cash account is recorded as a debit entry while an increase in the unearned revenue account is a credit entry. Therefore , the cash account is debited with the cash collected and the unearned account credited with the same amount.