Final answer:
The statement that indicates an understanding of the discharge teaching for home oxygen therapy is that the guardian will keep the oxygen concentrator in a cool, dry place, away from heat sources.
Step-by-step explanation:
The correct statement by the guardian that indicates an understanding of the discharge teaching for home oxygen therapy is: C. I will keep the oxygen concentrator in a cool, dry place, away from heat sources. This shows knowledge of proper safety and maintenance procedures for the oxygen equipment. Statement A is incorrect because the child may need to wear oxygen continuously depending on the prescription. Statement B is incorrect because disconnecting the tubing can lead to a risk of contamination or loss of oxygen flow when it's needed. Statement D indicates a need for medical intervention, but without prior teaching, it does not show an understanding of the daily maintenance or use of home oxygen therapy.