On Behalf of Medical Imaging Company,Nonny Signs an Instrument in Which

On behalf of Medical Imaging Company,Nonny signs an instrument in which she promises to deliver an MRI scanner to Openheart Cardia Clinic on June 1.This instrument is

A) negotiable.
B) nonnegotiable,because an MRI scanner is not "a medium of exchange author?ized or adopted by a domestic or foreign government as part of its currency."
C) nonnegotiable,because it does not indicate a specific brand of MRI scanner.
D) nonnegotiable,because it does not recite any consideration.