Which of the Following Would Be least likely to Diminish

Multiple Choice

Which of the following would be least likely to diminish the validity of evidence obtained through confirmation of accounts receivable?

A) The confirmation requests are sent on the client's letterhead.
B) The confirmation requests are mailed to customers by the internal auditors.
C) The client's mailroom personnel closely monitor and inspect confirmation requests during mailing.
D) The return address on the envelope used to send the confirmation request is that of the client.