When asked about the power of advertising in research surveys, most people agree that it works, but not on them.
当被问起宣传在研究调查中的作用时，大多数人会说宣传确实有用，但不是对他们。
也就是说宣传对他们没有用，也就是 ads are ineffective on them
题里面问的是ineffective，原文里面是 effective/work, but not
你得把句子看全了再选
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