25 What is the passage mainly about?
(A) How to sell big data to advertising companies
(B) How to use a company’s endless stream of data
(C) How to protect customer privacy in Internet-based businesses
(D) How to generate more ideas to paint a complete picture of a company
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The first step is to...
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請依下文回答第 21 題至第 25 題：...
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25 What is the passa...
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