Choice "B" is correct. The revenue cycle includes sales, receivables, and cash receipts, so an auditor using a transaction cycle approach would be likely to test sales and receivables together.
Choice "d" is incorrect. Purchases are part of the expenditures cycle while sales are part of the revenue cycle, so an auditor using a transaction cycle approach would be unlikely to test these items together.
Choice "a" is incorrect. Payables are part of the expenditures cycle while sales are part of the revenue cycle, so an auditor using a transaction cycle approach would be unlikely to test these items together.
Choice "c" is incorrect. Sale of long-term debt falls within the "other liabilities" transaction cycle while sales are part of the revenue cycle, so an auditor using a transaction cycle approach would be unlikely to test these items together.