Answer:
A. At the end of one accounting period result in cash receipts in a future period
Explanation:
Revenue is total amount of money firm receives or is entitled to receive, by selling its goods / services, in a period of time.
Revenue can be :
Accrued Revenue i.e Revenue Earned but not received in an accounting period : is an asset in form of debtors of a firm. The firm will get cash receipts from them in a future period.