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In what context would a "sanitizer" be used?

  1. The state of being private and away from other people.

  2. An instrument or machine for weighing.

  3. A substance or preparation for killing germs.

  4. Expectations and limits.

The correct answer is: A substance or preparation for killing germs.

A sanitizer is commonly used in contexts where infection control and hygiene are critical. It specifically refers to a substance or preparation that effectively kills germs on surfaces or skin, making it essential in healthcare settings such as hospitals, clinics, and care facilities. This practice helps prevent the spread of infections, which is particularly important when caring for vulnerable populations, like residents in long-term care facilities. The other options do not represent the function or purpose of a sanitizer. For instance, the state of being private pertains more to personal space or confidentiality, an instrument for weighing involves measurement and does not relate to hygiene, while expectations and limits focus on boundaries and guidelines in a caregiving context, but do not connect to the action of killing germs.