Question ID:PT92 S1 Q11 Passage:Science writer:  Studies indicate that North Americans are becoming more lethargic. One researcher has concluded from these data that fast-food consumption has an adverse effect on people's health. In the early 1970s the average North American family consumed one fast-food meal a week, while in the 1990s an average family consumed one fast-food meal a day. However, few lethargic adults exercise regularly, and lack of exercise can contribute to lethargy. Thus, the lethargy studies do not settle the question of whether fast food is unhealthy. Stem:Which one of the following most accurately expresses the conclusion of the science writer's argument? Correct Answer Choice:EChoice A:A lack of regular exercise is one cause of lethargy in North Americans. Choice B:High consumption of fast food is a health risk only when combined with a lack of regular exercise. Choice C:The researcher's data show that the consumption of fast food is not the main cause of poor health in North Americans. Choice D:The lethargy studies failed to consider one probable cause of lethargy. Choice E:The researcher's conclusion was not adequately justified by the lethargy studies.