Kelly Signs an Instrument in Favor of Len That States

Multiple Choice

Kelly signs an instrument in favor of Len that states it is "subject to a cer?tain agreement between Kelly and Mona." This instru?ment is

A) negotiable.
B) nonnegotiable,because it is made subject to a separate agreement.
C) nonnegotiable,because it refers to a separate agreement.
D) nonnegotiable,because Kelly and Mona are not the same persons.