A nurse is reinforcing client instructions on the use of an incentive spirometer. Which of the following statements made by the client indicates an understanding of the teaching?

A. “I will rest my hand over my abdomen to create resistance.” This technique is used for diaphragmatic breathing exercises, not incentive spirometry. It does not help assess or improve lung expansion, which is the primary goal of using the incentive spirometer. B. “I will lie on my back with my knees bent.” While lying down may be appropriate for some breathing exercises, the incentive spirometer is best used in a sitting or upright position. Sitting allows for maximal lung expansion and facilitates more effective use of the device. C. “I will place the adapter on my finger to read my blood oxygen saturation level.” This describes the use of a pulse oximeter, not an incentive spirometer. The spirometer measures inspiratory volume, while pulse oximetry is used to monitor oxygen saturation. D. "I will take in a deep breath and hold it before exhaling." The client should inhale slowly and deeply through the mouthpiece, hold the breath for several seconds to promote alveolar inflation, then exhale. This process helps prevent atelectasis and promotes lung expansion.