A charge nurse is teaching a group of health care workers about hand hygiene to prevent infection. Which of the following information should the charge nurse include in the teaching?

Rationale: A. Chlorhexidine is used for surgical hand scrubs or certain invasive procedures, not routine hand hygiene with immunosuppressed clients. B. Health care workers should not wear artificial nails at all when providing care, as they harbor microorganisms even with proper hand hygiene. C. Soap and water must be used for C. difficile, because alcohol-based rubs do not kill spores. D. Alcohol-based hand rubs are appropriate for most routine client care activities, including medication administration, unless hands are visibly soiled or the client has C. difficile or norovirus infection.