The passage is primarily intended to answer which one of the following questions? A. How high a tax should a country's government impose on carbon dioxide emissions? B. What issues should a country's government consider before deciding whether to impose a tax on carbon dioxide emissions? C. What assumptions underlie a country's decision to impose a tax on carbon dioxide emissions? D. How can the effects of industrial pollution on the Earth's atmosphere be decreased? E. What can be done to increase the effectiveness of any tax that a country imposes on carbon dioxide emissions?