(单选题)
With the lights out, diners eat less partly because ______.
A.they want to quickly finish their meals
B.they trust their feelings more than ever
C.they focus more on fun than the calories
D.they worry about the quality of the food.
参考答案：D
参考解析：
细节理解题。根据第一段最后一句“It also triggers (引发) a part of the brain that is worried that unseen food may go bad.”可知，它还会引发大脑对于看不见的食物可能会变质的担心。故选D。
知识点：
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