单选题 Water has become "cool" in the Minneapolis school district partly because ______.

A、 water is provided free
B、 most kids can afford nothing but water
C、 water machines are put in noticeable positions
D、 children have realized the harm of sugary drinks

【正确答案】 C

【答案解析】[解析] 从第二段的对话“‘We located the water machines strategically outside our buildings， so when you come out of a classroom what you see is a water machine．’says Bass，‘We also decided to allow water in classrooms but not juice or pop．”’可知，C项为正确答案。