Final answer:
The most related assertion to the objective of ensuring all sales are recorded is Completeness, as it focuses on preventing transaction omissions.
Step-by-step explanation:
The assertion most closely related to the audit objective to verify that all sales have been recorded is b) Completeness. This objective is concerned with ensuring that there are no omissions in the recording of transactions. In the context of auditing, completeness addresses whether all sales that should have been recorded are in fact recorded. This is different from existence or occurrence, which relates to verifying that recorded sales actually took place, or valuation or allocation, which pertains to the accuracy of the amounts recorded, or rights and obligations, which is about ensuring the entity has the rights to the revenue or the obligation to deliver goods or services.
The assertion that is most closely related to the audit objective to verify that all sales have been recorded is completeness. Completeness is an audit objective that ensures all transactions and events have been recorded in the financial statements. In the context of sales, it means verifying that all sales transactions have been accurately recorded in the company's books and records.