Charles Dieter and Joey Davis worked together to steal nearly $50,000 from Valdosta Medical Supply. Charles, an accounts payable clerk, deliberately overpaid a few of the companys vendors. He then called the vendors, explained the mistake, and asked for the excess to be refunded. Joey, a mailroom employee, intercepted the incoming refund checks and cashed them. What would be the best way to prevent this fraud scheme?

A. Better separation between custody of payments and recordkeeping B. Better separation between custody of payments and purchasing authorization C. Better separation between purchasing authorization and recordkeeping D. None of the above