28. As a matter of public policy, people are not allowed to sell their organs. Which of the following is a reason some economists believe that there would be large benefits in allowing a free market for organs?

1. Buyers of organs would be better off having the quantity available.
2. Sellers of organs would be worse off with less cash in their pockets.
3. The shortage of organs would disappear.
4. Such a market would lead to a non-efficient outcome.