Which of the Following Is NOT Part of the Preparation

Which of the following is NOT part of the preparation of a bubble humidifier for use on a patient?

A) Filling the reservoir with sterile, distilled water and testing to make sure there is no bacterial growth.
B) Testing can be accomplished by observing for bubbling and checking for flow at the outlet.
C) The outlet should also be occluded to test the safety popoff for function.
D) If the device is a prefilled disposable unit, make sure all seals have been appropriately broken on assembly.