Final answer:
The nurse should use a nasal catheter to deliver oxygen to the client.
Step-by-step explanation:
The nurse should use a nasal catheter to deliver oxygen to the client. A nasal catheter is a small, flexible tube that is inserted into the nostrils, delivering oxygen directly into the airway. It can provide a lower flow of oxygen, which is suitable for clients who are adequately oxygenated at a lower level. A nasal catheter is a comfortable and efficient option for long-term oxygen therapy.