What Factors Should You Consider When Placing an Oxygen Concentrator

What factors should you consider when placing an oxygen concentrator into a patient's home?
I. Know how large of an electrical load is allowed on the circuit you wish to use.
II. Keep the concentrator away from loose draperies.
III. Keep the concentrator away from heat vents, registers, or baseboard heaters.
IV. Place the concentrator centrally within the home if possible.

A) I
B) I and II
C) I, II, and III
D) I, II, III, and IV