All of the following are appropriate practices to manage oxidation sources in the operating room EXCEPT:
A. administer the lowest concentration of oxygen needed to maintain adequate oxygen saturation
B. use a laryngeal mask or endotracheal tube if the patient needs more than 30% supplemental oxygen
C. ensure that there are no leaks in the anesthesia circuit
D. turn the warmer blower off when using a warming blanket with an attached head drape
E. prevent oxygen from accumulating under drapes