Office supplies purchased by Janer's Cleaning Service on account were returned. The office supplies had not yet been paid for. Which of the following entries for Janer's Cleaning Service journalizes this transaction?

a$.$ debit Accounts Payable; credit Office Supplies

b$.$ debit Cash; credit Office Supplies

c$.$ debit Office Supplies; credit Accounts Payable

d$.$ debit Office Supplies; credit Accounts Receivable