A male client with a nasogastric tube connected to low intermittent suction tells the nurse that his mouth is very dry. Which action should the nurse implement?

Provide oral sponge toothettes so the client can cleanse and moisten his mouth.

Teach the client that the oral mucosa must remain dry to prevent aspiration.

Turn the suction off while allowing the client to rinse his mouth with cool water.

Instill 50 ml of normal saline solution into the tube and clamp the tube for one hour.