Which Oxygen Delivery System Is Most Appropriate for Ensuring Precise Oxygen Concentration for This Patient

a 65-year-old Male Patient with Chronic Obstructive Pulmonary Disease (COPD) Is Admitted to the Hospital with Complaints of Increasing Shortness of Breath over the Past Week. His Arterial Blood Gas (ABG) Results Show a Partial Pressure of Oxygen (Pao2) of 55 Mmhg and a Partial Pressure of Carbon Dioxide (Paco2) of 48 Mmhg. the Healthcare Team Decides to Initiate Oxygen Therapy