A nurse is caring for a 1-year-old child who has been hospitalized. Which of the following items in the child's room is a common source of health care-associated infection?

A. Disposable diapers are not typically associated with healthcare-associated infections. B. Protective plastic gowns are used to prevent transmission but do not contribute to healthcare-associated infections when used properly. C. Unopened bottles of formula are safe from contamination until they are opened and prepared. D. The bedside computer keyboard is a common source of healthcare-associated infection due to frequent handling and minimal cleaning, making it a vector for bacteria and viruses.