Final answer:
A Hudson mask or simple mask typically requires an oxygen flow rate of b) 6-8 lpm to provide proper oxygen therapy with concentration levels of 40-60%.
Step-by-step explanation:
The amount of liters per minute (lpm) required for a Hudson mask or simple mask is generally 6-8 lpm. This level of flow is needed to ensure that the oxygen being delivered is sufficient to meet the patient's respiratory demands without causing excess air dilution from the environment. Oxygen therapy through a Hudson mask aims at providing more oxygen than what is available in room air, which contains about 21% oxygen. By supplying oxygen at 6-8 lpm, the mask can deliver an oxygen concentration up to 40-60% given proper fit and patient breathing.