In the last decade there has been a significant decrease in coffee consumption. During this same time, there has been increasing publicity about the adverse long-term effects on health of the caffeine in coffee. Therefore, the decrease in coffee consumption must have been caused by consumers` awareness of the harmful effects of caffeine.
Which of the following, if true, most seriously calls into question the explanation above?
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AOn average, people consume 30 percent less coffee today than they did 10 years ago.
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BHeavy coffee drinkers may have mild withdrawal symptoms, such as headaches, for a day or so after significantly decreasing their coffee consumption.
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CSales of specialty types of coffee have held steady as sales of regular brands have declined.
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DThe consumption of fruit juices and caffeine-free herbal teas has increased over the past decade.
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ECoffee prices increased steadily in the past decade because of unusually severe frosts in coffee-growing nations.
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