A nurse is teaching a client who has asthma how to use a peak flow meter. Which of the following statements indicates the client understands the teaching?

"I will blow out as hard as I can before I use the peak flow meter."

"I will not take my controller medication if my peak flow meter scores in the yellow zone."

"I will base my peak flow meter score on the best of three attempts."

"I will go to the emergency room if my peak flow meter is in the green zone."