Which of the following audit procedures would be most effective in determining whether vendor invoices...

Determine the length of processing time between the receipt of the vendor's invoice to the payment date for the related disbursement.

Interview the accounts payable manager to determine the procedures and standards for processing vendor invoices.

Compare the vendor's invoice due date with the payment date as indicated on the cancelled check.

Compare the date stamped on the invoice for receipt with the corresponding payment date for the disbursement.