Final answer:
Jeffrey should use positive confirmation in this scenario.
Step-by-step explanation:
Jeffrey should use Positive confirmation in this scenario.
Positive confirmation is used when the auditor expects a low exception rate and has assessed the risk of material misstatement as low. It involves directly contacting the recipients of accounts receivable to verify the information.
Since the population consists of a small number of large account balances and internal controls are effective, positive confirmation would provide the most reliable audit evidence.