The following transactions for the month of March have been journalized and posted to the proper accounts Mar. 1 The business received $7,000 cash and issued common stock to stockholders. Mar. 2 Paid the first month's rent of $700. Mar. 3 Purchased equipment by paying $4,000 cash and executing a note payable for $6,000. Mar. 4 Purchased office supplies for $700 cash. Mar. 5 Billed a client for $12,000 of design services completed. Mar 6 Received $9,000 on account for the services previously recorded What is the balance in Accounts Receivable? O A. $12,000 O B. $3,000 O C. $9,000 OD. $6,000