Oxygen at 1 to 2 L/min. The nurse should ensure that the client has which of the following supplies upon discharge?

Explanation: A nasal cannula is a device used to deliver supplemental oxygen to a client. It consists of two prongs that are inserted into the client's nostrils and connected to an oxygen source. The nasal cannula is commonly used for low-flow oxygen delivery at a rate of 1 to 2 liters per minute (L/min). The other options mentioned are not necessary supplies for the client upon discharge: B- Petroleum jelly is not directly related to oxygen therapy and is not a required supply for the client. It is a common topical ointment used for various purposes such as moisturizing the skin or protecting the lips, but it is not specifically needed for oxygen administration. C- An oxygen mask is an alternative device for oxygen delivery but is not typically used at a flow rate of 1 to 2 L/min. Oxygen masks are usually employed for higher flow rates or in specific clinical situations that require a different oxygen delivery method. D- A reservoir bag is a component of some oxygen delivery systems, such as a non-rebreather mask or a bag-valve-mask device. However, at a flow rate of 1 to 2 L/min, a reservoir bag is not typically used. It is more commonly utilized in situations where higher oxygen concentrations or higher flow rates are required.