A nurse is reinforcing teaching with a client's family about home oxygen use via nasal cannula. Which of the following statements by a family member indicates an understanding of the teaching?

"We will frequently check the top of his ears for sores."

"We can turn the oxygen up to 10 when he has trouble breathing."

"We can use petroleum jelly to keep his nares moist."

"We will need to remove the nasal cannula when he is eating."