Answer:
c. A debit to Retained Earnings and a credit to all expense accounts.
Step-by-step explanation:
At the end of the year, the revenue and expenses are closed into the retained earnings account.
The revenue account usually has a credit balance and as such is closed by debiting it and crediting retained earnings.
The expense account is ordinarily a debit balance and as such is closed by crediting it and debiting the retained earnings account.