1. Which of the following is an effective control to ensure that sales returns are valid?

Require that sales returns are handled by the same employee who credits the customer s account.

Periodically select a sample of credit memorandums and ensure that they have been properly recorded.

"Do not allow credit memorandums to be recorded in the sales journal; rather, create a separate sales returns journal."

Trace the monthly totals on the sales journal to the general ledger to ensure that they are correctly posted.

Require a receiving report to be attached to all credit memorandums prior to approving the return.