All of the Following Factors Contribute to Hospital- Acquired Infections

All of the following factors contribute to hospital- acquired infections EXCEPT

A) some bacteria metabolize disinfectants.
B) bacteria may be present in commercial products such as mouthwash.
C) invasive procedures can provide a portal of entry for bacteria.
D) gram- negative bacteria are often resistant to disinfectants.
E) None of the answers is correct; all of these factors may contribute to hospital- acquired infection.