Congress passes an act requiring that all owners of bicycles in the United States register them with a federal bicycle registry. The purpose of the law is to provide reliable evidence of ownership to reduce bicycle theft. No fee is charged for the registration. Although most stolen bicycles are kept or resold by the thieves in the same cities in which the bicycles were stolen, an increasing number of bicycles are being taken to cities in other states for resale. Is this act of Congress constitutional?
Yes, because Congress has the power to regulate property for the general welfare.  Yes, because Congress could determine that in inseverable aggregates bicycle thefts affect interstate commerce.  No, because most stolen bicycles remain within the state in which they were stolen.  No, because the registration of vehicles is a matter reserved to the states by the Tenth Amendment