13. Individuals have two kidneys, but most of us need only one. People who have lost both kidneys through accident or disease must be hooked up to a dialysis machine, which cleanses waste from their bodies. Say a person who has two good kidneys offers to sell one of them to someone whose kidney function has been totally destroyed. The seller asks $30,000 for the kidney, and the person who has lost both kidneys accepts the offer. ( LO1-3 )

a. Who benefits from the deal?

b. Who is hurt?

c. Should a society allow such market transactions? Why?