Arrange the sentences in a proper sequence so as to make a coherent paragraph.
A. In emission trading, the government fixes the total amount of pollution that is acceptable to maintain a desired level of air quality.
B. Economists argue that this approach makes air pollution control more costeffective than the current practice of fixing air-pollution standards and expecting all companies to pollute below these standards.
C. The USA uses emissions trading to control air pollution.
D. It then distributes emission permits to all companies in the region, which add up to the overall acceptable level of emission.
- BADC
- ACDB
- CBAD
- DBAC