Which of the following is an advantage of a premium support system for Medicare enrollees? a. It would lower overall costs by reducing adverse selection. b. It would impose government's preferences on individuals. c. It would promote efficiency by introducing competition. d. It would lower moral hazard by allowing only the healthiest individuals to enroll for Medicare. QUESTION 20 1 poi When there is a deadweight loss caused by a tax: a. the quantity bought and sold is not affected by the tax. b.consumers are better off, but producers are worse off. c. some efficient trades are not being made. d. only inefficient trades are being made