Question ID:PT69 S4 Q20 Passage:Unusually large and intense forest fires swept the tropics in 1997. The tropics were quite susceptible to fire at that time because of the widespread drought caused by an unusually strong El Ni√±o, an occasional global weather phenomenon. Many scientists believe the strength of the El Ni√±o was enhanced by the global warming caused by air pollution.  Stem:Which one of the following can be properly inferred from the information above? Correct Answer Choice:EChoice A:Air pollution was largely responsible for the size and intensity of the forest fires that swept the tropics in 1997. Choice B:If the El Ni√±o in 1997 had not been unusually strong, few if any large and intense forest fires would have swept the tropics in that year. Choice C:Forest fires in the tropics are generally larger and more intense than usual during a strong El Ni√±o. Choice D:At least some scientists believe that air pollution was responsible for the size and intensity of the forest fires that swept the tropics in 1997. Choice E:If air pollution enhanced the strength of the El Ni√±o in 1997, then it also contributed to the widespread drought in that year.