All but Which One of the Following Is Required of a Negotiable

Multiple Choice

All but which one of the following is required of a negotiable instrument?

A) It must be payable only out of a particular fund.
B) It must contain an unconditional promise or order to pay a fixed amount in money.
C) It must be payable on demand or at a definite future date.
D) It must be in writing and signed by the maker or drawer.