Concept:A bill of exchange requires the debtor's acceptance to become a valid and valuable instrument.
Explanation:A bill of exchange is a written order used mainly in international trade.
It binds one party to pay a fixed sum of money to another party on demand or on a predetermined date.
For this instrument to be legally enforceable, the debtor (the drawee) must accept it.
Acceptance means the debtor agrees to pay the amount stated in the bill.
Without this acceptance, the bill is not binding on the debtor and has no value as a payment instrument.
Therefore, among the given means of payment, it is the bill of exchange that requires acceptance by the debtor.
Answer:A. Bill of exchange