The nurse observes an unlicensed assistive personnel (UAP) applying an alcohol-based hand rub while leaving a client's room after taking vital signs. Which action should the nurse take?

A. Reminding the UAP to continue rubbing the hands together until they are dry ensures proper use of the hand rub, which is effective when fully dry. B. Handwashing with soap and water is necessary after certain activities (e.g., after using the restroom, or when hands are visibly soiled), but using an alcohol-based hand rub is appropriate for routine hand hygiene. C. Supervising in the next client's room is less direct and immediate than ensuring proper technique now. D. Wearing gloves for all clients is not necessary and does not replace proper hand hygiene.