Jack Signs an Instrument That States It Is Being Executed

Multiple Choice

Jack signs an instrument that states it is being executed "in accord with a contract for the sale of three magic beans dated July 1." This instru?ment is

A) negotiable.
B) nonnegotiable,because banks cannot easily process commodities.
C) nonnegotiable,because it includes the specific date of a contract.
D) nonnegotiable,because it refers to an express contract.