The primary nurse observes the unlicensed nursing assistant removing the nasal cannula from the client diagnosed with COPD while ambulating the client to the bathroom. Which action should the primary nurse take? 1. Praise the NA because this prevents the client from tripping on the oxygen tubing. 2. Place the oxygen back on the client while sitting in the bathroom and say nothing. 3. Explain to the NA in front of the client that the oxygen must be left in place at all times. 4. Discuss the NA’s action with the charge nurse so that appropriate action can be taken.