Klaus Forges Lot's Name as the Maker of a Note

Multiple Choice

Klaus forges Lot's name as the maker of a note "payable to Klaus." Klaus indorses the note in blank, sells it to Mort, and disappears. Without indorsement, Mort sells the note to Nora, who, also without indorsement, sells the note to Obie. On discovery of the forgery, most likely liable to Obie is

A) none of the choices.
B) Lot.
C) Mort.
D) Nora.