Jack Is a Guest at Harry's Home

Jack is a guest at Harry's home. While there, he goes into the library and picks up a music box that is part of Harry's collection. Jack overwinds the stem and it breaks. Hoping Harry won't notice, Jack takes the music box for repair to a jeweler who sells similar ones. The jeweler fixes it, but forgets to tag it and an unsuspecting clerk sells it to Robert. Jack is frantic. Can Harry get the music box from Robert?

A) No, the jeweler gives good title to a bona fide purchaser for value.
B) No, the jeweler was not a merchant with regard to music boxes.
C) Yes, Robert was not a buyer in the ordinary course of business.
D) Yes, Robert has assumed only Jack's title, which is no title at all.