Question ID:PT90 S4 Q8 Passage:Climatologist:  The waters off the Pacific coast of North America have warmed about 4 degrees over the past 15 years. Some scientists claim that this trend is a symptom of a more general, global warming caused by human-generated air pollution. However, this conclusion is far from justified‚ it is known that there are many natural cycles of ocean temperature changes that last 60 years or more. Stem:Which one of the following most accurately expresses the main conclusion drawn in the climatologist's argument? Correct Answer Choice:CChoice A:Some scientists have found evidence that the waters off the Pacific coast of North America have grown significantly warmer over the past 15 years. Choice B:The warming of the waters off the Pacific coast of North America is not a symptom of a more general, global warming caused by human-generated air pollution. Choice C:The conclusion that the warming of the waters off the Pacific coast of North America is a symptom of a more general, global warming caused by human-generated air pollution is far from justified. Choice D:The warming of the waters off the Pacific coast of North America may be the result of a natural cycle of ocean temperature changes. Choice E:If the warming of the waters off the Pacific coast of North America is due to a natural cycle of ocean temperature changes, then it is not a symptom of a more general, global warming caused by human-generated air pollution.