10. From a firm's perspective, what policy would it least prefer (Choose 1) a. The optimal emissions tax b. The optimal abatement subsidy c. The efficient emissions standard d. Command-and-Control Question 11. For regulating pollution from diffuse sources, such as exhaust from cars, it is difficult to identify who produced the pollution. Which of the following is the best way to regulate pollution in this case? a. The optimal emissions tax b. The optimal abatement subsidy c. The efficient emissions standard d. Command-and-Control Question 12. Carbon dioxide and sulfur dioxide are air pollutants emitted as a byproduct of coal- based electricity production. These air pollutants are examples of a. An emissions tax b. An abatement subsidy c. Command-and-Control policy d. A negative externality e. Abatement costs Question 13. A CAC policy would require all power plants to install scrubbers regardles of how expensive it is for the firm to do so. Question 14. You always need regulation to correct an externality. True or False? Justify your