Answer:
d. debit Income Summary $9,000 and credit Salary Expenses $4,000; credit Rent Expense $3,000; credit Purchases $2,000.
Step-by-step explanation:
Based on the information given the correct closing entry that RB Auto would make to close their expense account(s) at the end of the accounting period is:
Debit Income Summary $9,000
($4,000+$3,000+$2,000)
Credit Salary Expenses $4,000
Credit Rent Expense $3,000
Credit Purchases $2,000
(To close expense account)