Final answer:
Confirmation of accounts receivable is optional, while confirmation of accounts payable is required.
Step-by-step explanation:
The correct answer to the question is option C) Accounts Receivable: Optional, Accounts Payable: Required.
Confirmation of accounts receivable means verifying the balances owed to a company by its customers. This is optional because some companies may not have a significant accounts receivable balance or may have other methods of ensuring the accuracy of their accounts receivable.
Confirmation of accounts payable involves confirming the amounts owed by a company to its vendors or suppliers. This is required because accounts payable represent an important liability for the company and confirmations help ensure that these amounts are accurate.