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1. A. Protecting one's computer from malware and cybercrimes can be

   a daunting task, but careful consideration of guidelines can

   improve one's online experience. First, users should bear in mind

   that their browsers need not be open for criminals to access their

   hard drives remotely

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2. A

   Explanation:

   A is a formal answer that does not make fun of people who do not think the same as the author. For example, B calls them "Silly" C asks sarcastically how they can complain, and D writes that it's Ironic people use computers to condemn NASA. All of these answers are informal because they poke fun at the audience that does not agree with their point instead of stating their argument clearly, like A.

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