Hank steals an old, battered bicycle that is parked, unlocked, in front of a convenience store. He repairs, paints, and replaces parts on the bike until it is like new. The original owner, Sally, claims the bike. The bike belongs to

	a.	Hank and Sally as tenants in common.
	b.	Sally because Hank stole it.
	c.	Hank because he made substantial improvements to it.
	d.	Hank because Sally claimed it only after Hank improved it.