Which of the Following Notes Would Not Be Negotiable? a Written,signed

Multiple Choice

Which of the following notes would not be negotiable? A written,signed promise to pay:

A) $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) $500 and a rick of firewood on or before September 10.
C) 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) All of the above.