While Making Rounds,the Charge Nurse Observes a Staff Nurse Cleaning

While making rounds,the charge nurse observes a staff nurse cleaning a surgical wound and notes that the staff nurse has cleaned the wound from the top to the bottom of the wound.Which action should the charge nurse take in this situation?

A) Request the staff nurse clean the wound again using a circular motion and cleaning from outside the wound to the wound itself.
B) Make arrangements for the staff nurse to visit the education department for retraining in wound cleaning.
C) Continue with rounds with the knowledge that the staff nurse used the proper cleaning technique.
D) Inform the staff nurse that the charge nurse will be observing the client for signs of infection.