Answer: d. Void.
Explanation:
The seller stole the jewelry and so does not hold any legal title to the jewelry in the first place. The seller cannot therefore pass something that they do not possess which means that Hugo did not get a title.
Hugo's supposed title is therefore void which means that should the real owner of the jewelry ever find out that he has it, they can simply come back and claim it without needing to pay Hugo for it.
