Answer (A) is correct.
A turnaround document is a computer output prepared in such a way that
it can eventually be used as a source document for an input transaction.
For example, an optical character recognition (OCR) document might be
used as a sales invoice to be mailed to a customer and returned with
payment. Thus, no new document would have to be prepared to record
the payment. Utility bills are often mailed to customers in the form of