同等学力申硕外国语水平（英语）
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第 6 题单选题模拟题基础
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A bakery chain with forty shops in the north has stopped giving out plastic bags. Customers who forget to bring their own bag can buy a paper one for a small charge, and the money goes to a local tree-planting group. In the first three months, the chain used 1.2 million fewer plastic bags. A spokesperson said the change had been "easier than expected", because most customers already carried shopping bags of their own.
Why was the change "easier than expected"?
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