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American Incentive Student of University Economizes a Commissary The once-seen-everywhere cafeteria tray .with so many glass

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问题           American Incentive Student of University Economizes a Commissary
    The once-seen-everywhere cafeteria tray .with so many glasses of soda, juice and milk lined up across the fop, could soon join the typewriter as a campus relic. Scores of colleges and universities across the country are shelving the trays in hopes of conserving water, cutting food waste and saving money. Some even believe trayless cafeterias could help avoid the dreaded "freshman 15" the number of pounds supposedly gained in the first year on campus.
    The Sustainable Endowments Institute, a research organization that tracks environmental practices at the 300 colleges and universities with the largest endowments, said that 126 of them had reduced use of trays, some of them getting rid of trays only in certain dining halls,and some introducing,for example, "trayless Tuesdays". Such moves are often part of a larger push to embrace environmental ism that includes hiring susta-inability coordinators, introducing solar panels, disposing dining-hall waste and encouraging students to turn off lights with attractive sayings.
    Joseph H. Spina, executive director of the National Association of College and University Food Services, described trayless dining as "sort of the hot thing right now", officials said their decision to go trayless was mainly about atmosphere, though they welcomed any ecological benefit. But while the environ-mental benefits are real, going trayless is not a cure-all. At Skidmore.the all-you-can-eat format and multiple food stations, featuring vegetables, Italian and classic comfort foods, encourage students to look around,taking a bit of this and a little of that. But this system also leads to overcrowded dining halls as diners return to the lines for seconds.
    As part of her senior honors thesis,Sarah Whateley, an environmental studies major, conducted a research project to demonstrate how much food was still wasted in the dining hall. She asked students to put their leftovers into plastic bins over two days, yielding 330 pounds of food on a Sunday and 403 pounds on a Monday. The food services staff then illustrated that quantity by stacking the equivalent weight in boxes of rice in the entrance of the dining hall.
    Dr. Spina, of the college food service association, cited another benefit: " You eventually have to learn how to hold your hors d’oeuvre and cocktail in one hand while
making conversation with the other. So it’s a life lesson."
What do the environmental practices at the 300 colleges and universities carry out?
选项 A、They try measures to make trays less used.
B、They make experiment on solar panels.
C、They impose strict rules on turning off lights.
D、They hire people to deal with the dining-hall waste.
答案A
解析 事实细节题。由题干中的environmental practices at the 300 colleges and universities定位到第二段。本段第一句说，各个学校采用不同的方式，但目的都是一个——减少或完全制止食堂托盘的使用。所以[A]为正确答案。第二句说他们是使用太阳能板，而不是[B]“实验太阳能板”，故排除；他们是使用标语劝说学生关灯，而不是[C]“严格的条款要求学生关灯”，故排除；他们雇用的是环保协调员，而不是[D]“食堂废弃物处理员”，故排除。
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