Final answer:
The assertion of completeness directly relates to the objective of verifying that all sales have been recorded, as it involves confirming there are no omissions in the financial records.
Step-by-step explanation:
The management assertion most closely related to the audit objective to verify that all sales have been recorded is a. completeness. The assertion of completeness is concerned with ensuring that all transactions that should have been recorded have indeed been recorded in the correct accounting period. An auditor checks for completeness to confirm there are no omissions in the financial statements, which is directly related to ensuring that all sales are recorded.