The post-operative nurse teaches a client how to use their incentive spirometer after surgery. What statement made by the client indicates the teaching was effective?

"I should breathe in slowly and deeply until the marker reaches the goal."

"I should use the spirometer whenever I'm feeling shortness of breath."

"I should quickly breathe in and out while I'm using the mouthpiece."

"I should blow into the spirometer hard so that I can clear my lungs."