PT 50 S2 Q13

Fossil-fuel producers say that it would be prohibitively expensive to reduce ... ...

Which one of the following, if true, most strengthens the argument?
(A) In the time since the chemical industry phased out CFCs, the destruction of the ozone layer by CFCs has virtually halted, but the levels of carbon dioxide emitted by the use of fossil fuels have continued to increase.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in Practice Set: "Stronger" Questions, Set 2