Obsolete or scrap materials are charged to a predefined project number. The materials are segregated into specified bin locations and eventually transported to a public auction for sale. To reduce the risks associated with this process, an organization should employ which of the following procedures?

Require managerial approval for materials to be declared scrap or obsolete.

Permit employees to purchase obsolete or scrap materials prior to auction.

Limit obsolete or scrap materials sales to a pre$-$approved buyer.

Specify that a commission be paid to the auction firm.

A$.1$ and $4.$

B$.2$ and $4.$

C$.2$ and $3.$

D$.1,3,$ and $4.$