单项选择题

How many pieces of advice are offered by the author to protect online shoppers' privacy

A．1.
B．2.
C．3.
D．4.
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What are Cookies in the following passage
A．Computer data.
B．Shopping habits.
C．Websites.
D．Passwords.
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Which of the following books draws on case studies
A．Modernism.
B．Science Fiction.
C．Autobiography.
D．Culture/Metaculture.
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