Which of the following is a standard control over cash disbursements? a. checks and supporting documents should be marked "paid" immediately after the check is returned with the bank statement. b. checks should be sequentially numbered and the numerical sequence should be accounted for by the person preparing bank reconciliations. c. checks should be sent directly to the payee by the employee who prepares documents that authorize check preparation. d. checks should be signed by the controller and at least one other employee of the company.