A nurse is providing teaching to a client who has COPD. Which of the following statements should indicate to the nurse that the client understands the teaching?

"I should drink 1.5 liters of water daily to keep hydrated."

"I should make my abdomen rise with each inhalation."

"I should inhale through my mouth and exhale through my nose."

"I should limit walks to 10 minutes daily in order to conserve my energy."