During a surgical procedure, the RN observes a surgeon wearing sterile gloves brush his posterior hand surface on a tray. The tray had been cleaned with a liquid chemical agent. What is the most appropriate action by the RN?
a. Cleaning the tray again with a liquid chemical agent
-b. No intervention is necessary as the tray is sterile
c. Notification of the surgeon of the observation
d . Assertion to the surgeon that a change of gloves is necessary before continuing the procedure