A nurse is collecting data from a client who uses a continuous positive airway pressure (CPAP) machine at night for sleep apnea. The nurse should identify which of the following findings as an indication of proper CPAP use?

There is one finger width between the strap on the mask and the client's face.

The therapeutic dose of albuterol is being inhaled.

The mask fits loosely so air can escape from underneath.

The mask is secured over the client's mouth and the client's nose is uncovered.