Final answer:
The client's statement that they would leave the heat pack on for an hour shows a need for further education on heat pack application, which should last no longer than 20 minutes to avoid burns and understand the rebound effect of heat.
Step-by-step explanation:
The statement by the client that indicates the need for further education is: D) I will leave the heat packs on for an hour. This indicates a misunderstanding of the proper duration for heat pack application. Typical guidance for hot pack use on areas like an infection or a wound is to apply the heat for no more than 20 minutes at a time. Leaving heat on for prolonged periods, such as an hour, can increase the risk of burns, particularly in an individual with diabetes, which may impair sensation and the body's ability to respond to heat. It is important for clients to understand the rebound effect of heat application, which refers to the body's physiological response to prolonged heat, potentially leading to additional swelling after initially reducing it.