In which one of the following examples is the instrument negotiable?
A) A draft that says: "Pay to the order of Sue Smith once she repairs my computer"
B) An instrument that says only: "This confirms my $1000 debt to Sue Smith"
C) A note that says: "Payment is conditional upon the terms of the mortgage between the parties dated June 1, 2000"
D) A note that says: "This note is secured by the property described in the parties' mortgage of June 1, 2000