What Is a Promissory Note

What is a promissory note?

A) A "gentleman's agreement" to pay for products that were shipped on faith that the payment would be forthcoming.
B) A short-term loan which uses accounts receivable as collateral for a loan.
C) An agreement signed by the buyer stating when and how much money will be paid to the seller in return for immediate credit.
D) The requirement for a firm to maintain a certain amount of funds on deposit with the lending bank.
E) The right given to a bank to seize certain assets if payment is not made when due.