i.

c. subsidized; taxed

Clean energy generates positive externality. Therefore, the subsidies will help to increase the consumption of clean energy and therefore maximize positive externality. On the other hand, dirty energy generates negative externality. Hence, the companies involved in such activities are taxed for them to meet the cost of polluting the environment.

Ii

False

Deadweight loss comes from market distortions such as taxes and price controls that cause a reduction in total surplus.