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How would you explain standard precautions to a friend?

A. cleaning things in an ordinary way to maintain hygiene cleaning things in an ordinary way to maintain hygiene , ,

B. covering your mouth when you cough to stop saliva from escaping covering your mouth when you cough to stop saliva from escaping , ,

C. using common sense to prevent getting sick using common sense to prevent getting sick , ,

D. using plenty of hand sanitizer to eliminate germs