The Client Is Being Prepared for Home Oxygen Use

The client is being prepared for home oxygen use.The client's spouse smokes two to three packs of cigarettes per day.Which is the nurse's priority instruction to the client and spouse?

A) Inform the health care provider that home oxygen use would be dangerous for this client.
B) Instruct the spouse on the need to smoke outside.
C) Instruct the spouse on the hazards of smoking in the same room with the client.
D) Instruct the spouse to quit smoking.