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?

Use chlorhexidine to wash hands if the client is immunosuppressed.

Keep artificial nails trimmed.

Wash hands with alcohol-based hand rubs when caring for a client who has Clostridium difficile.

Use alcohol-based hand rubs before administering eye drops for a client.