Proton Enterprises makes supplies and replacement parts for high-tech medical devices, and some of its products are potentially dangerous. Proton does not want certain products sent to clients who do not have the required regulatory certifications to receive them. Which of the following is the best course of action for Proton to take?

A : Proton company software matches the customer number on the sales invoice to that on the sales order.

B : Proton company software matches all issued inventory to authorized sales orders.

C : Only a small number of Proton employees are permitted to change the customer master file, and management reviews all changes.

D : A Proton employee double-checks all customer statements and notifies an outside department of any discrepancies.