Which of the Following Would Not Be Negotiable

Multiple Choice

Which of the following would not be negotiable?

A) A written, signed promise to pay  $50,000 to the order of Crouch, and the maker of the note orally stated to Crouch that the money would only be paid if all contractual specifications were met.
B) A written, signed promise to pay  $500 and a rick of firewood on or before September 10.
C) A written, signed promise which includes a statement that, "This note is given in partial payment for a piano to be delivered in one week from date in accordance with a contract of this date between the maker and the payee."
D) A check for $475, made payable to Bob Owens, with tomorrow's date on it.