Refer to the information provided in Figure 4.4 below to answer the question(s) that follow.


Refer to Figure 4.4. Assume that initially there is free trade. To reduce U.S. imports without a tax, the U.S. could
◦ increase pollution control regulations.
◦ allow drilling for oil in the Alaska National Wildlife Refuge.
◦ increase safety regulations for oil refineries.
◦ All of these.