Final answer:
The RT should maintain the current oxygen therapy.
Step-by-step explanation:
In this scenario, the RT should maintain the current oxygen therapy. The 2-year-old child is receiving supplemental oxygen through a simple mask at 5L/min, which is an appropriate therapy for their condition. Increasing the oxygen flow rate or switching to a non-rebreather mask may not be necessary unless there is a change in the child's condition that requires higher oxygen levels. Discontinuing oxygen therapy would not be appropriate as the child still requires supplemental oxygen.