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单选题
16.（单选题）Many economists believe that advertising helps increase competition, which leads to lower prices, thus benefiting consumers and the economy as a whole.
A
A.许多经济学家认为，广告增加了竞争的成本，使商品质量不断下降，这就使消费者的经济利益受到损害。
B
B.许多经济学家相信，广告加剧了竞争，又降低了商品的价格，所以消费者和整个经济都会从中得到好处。
C
C.许多经济学家坚信，广告会加剧竞争，过度的竞争使商品质量低劣，从而影响消费者整体的经济利益。
D
D.许多经济学认为，广告有助于竞争，而竞争的加剧会降低商品价格，从而使消费者和经济在整体上受益。
答案解析
正确答案：D
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