Which of the Following Questions Is Most Likely to Be

Which of the following questions is most likely to be found on an internal control questionnaire concerning a company's conversion processes?

A) Are vendor invoices for materials purchases approved for payment by someone who is independent of the cash disbursements function?
B) Are signed checks for materials purchased mailed promptly without being returned to the department responsible for processing the disbursement?
C) Are approved requisitions required when materials are released from the company's warehouse into production?
D) Are details of payments for materials balanced to the total posted to the general ledger?