A nurse is providing discharge teaching to a client who has a new prescription for home oxygen therapy using a compressed oxygen system. Which of the following statements by the client indicates an understanding of the teaching?

A. "I will regulate the oxygen flow rate as needed.": Clients should never change their prescribed oxygen flow rate independently. Altering the rate without guidance can lead to hypoxemia if too low or oxygen toxicity if too high. B. "I will store oxygen tanks in an upright position.": Oxygen cylinders should always be stored upright and secured to prevent tipping, which could cause the cylinder to become a dangerous projectile. This demonstrates safe handling of compressed oxygen. C. "I should check the oxygen equipment once per week.": Oxygen equipment should be checked daily for function, cleanliness, and safety. Weekly checks are insufficient and could allow unnoticed malfunctions to compromise oxygen delivery. D. "I should place the oxygen equipment 4 feet from a heat source.": Oxygen equipment should be kept at least 8 feet away from open flames, heaters, or other heat sources. Four feet is too close and increases the risk of fire hazards.