Gina is currently working on the audit of a major attestation client. Gina has been tasked by her supervisor to audit the client's

purchases process, and is preparing this week to audit purchase adjustments. During lunch on Monday, Gina asks her supervisor Steve

what documentation she should collect that would support any purchase adjustments made by the client. Which of the following

represents Steve's most appropriate response to this question?

You should consider collecting credit memos. These memos are used extensively by the client to document and record

return shipments of goods sold on credit.

You should consider collecting debit memos. The client uses these debit memos to document purchases returns by clients,

and subsequent adjustment to the liability accounts.

You should consider examining a sample of debit memos. The client uses these debit memos to document returns made by

customers and the subsequent lowering of its asset accounts.

You should consider collecting credit memos. These memos are what the client uses to document and record purchase

adjustments to payables accounts.