A nurse is teaching a group of assistive personnel about performing hand hygiene when caring for a client who has an immunodeficiency disorder. Which of the following information should the nurse include in the teaching?

A. Effective handwashing with soap and water requires at least 20 seconds of friction to adequately remove microorganisms. Five seconds is insufficient, especially when caring for immunocompromised clients. B. Using an alcohol-based hand rub is appropriate after contact such as taking a pulse, as long as hands are not visibly soiled. Alcohol-based rubs are highly effective, fast-acting, and recommended to reduce transmission of microorganisms, which is critical when caring for clients with immunodeficiency disorders. C. Hands should be dried from the fingers toward the wrists to prevent contaminated water from flowing back onto clean areas. Drying from wrist to fingers increases the risk of recontamination. D. Artificial nails are not recommended when caring for immunocompromised clients because they harbor microorganisms and increase infection risk. Hand hygiene does not compensate for the increased contamination risk associated with artificial nails.