Which of the Following Actions Is Least Likely to Help

Multiple Choice

Which of the following actions is least likely to help prevent and detect schemes involving fraudulent invoices from non-accomplice vendors?

A) Marking "paid" on every voucher that has been paid
B) Verifying vendor address changes before disbursements are issued
C) Matching all bank statement items to canceled checks
D) Separating the duties of purchasing, authorizing, and distributing payments