PT 17 S4 Q20

One way governments can decrease air pollution is to impose a tax on industrial ... ...

In response to the question, "Should countries act unilaterally to curb emissions?" (lines 53-54), the author would be most likely to contend that a country should
(A) not act unilaterally because, although that country would receive some benefits from such action, other countries would most likely be harmed by it
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: Government & Economics Mix 3