Ecologist: It is true that the solution of the problem of global warming will require important changes in the way we use fossil fuels over the long term and that the free market must play an important role in making these changes possible. But these facts should not make us forget how crucial near-term limits on the emissions of "greenhouse gases" are to motivate these changes. When the issue was the limitation of ozone-reducing substances, it was short-term emissions limits that quickly brought the needed technologies to the marketplace. These technologies were not available until the international community had adopted specific limits on ozone-depleting substances.

By which one of the following means does the author of this passage make his case?

(A) making a careful distinction between two key terms

(B) questioning the accuracy of the evidence given to support the opposition's case

(C) using an appropriate analogy

(D) using the literal meaning of a word that could be construed as metaphoric

(E) using premises that are contradictory

What is the passage talking about? And why is the answer "C"?

Is there anyone that can help me with Reading Comprehension? I'm reading the passages and I'm having a hard time understanding it and answering the questions. I can't even get the questions right without it timed. Am I the only one experiencing this?