Grace Signs an Instrument Payable to the Order of Hillside

Multiple Choice

Grace signs an instrument payable to the order of Hillside Credit Union "on or before" June 15. This instrument is

A) negotiable.
B) nonnegotiable, because the maker can move up the payment date.
C) nonnegotiable, because moving up the payment date is optional.
D) nonnegotiable, because the exact payment date cannot be deter?mined from the face of the instrument.