A nurse is teaching a client who has diabetes mellitus about foot care. Which of the following instructions should the nurse include?

A. Using a heating pad is not recommended for clients with diabetes due to reduced sensation (neuropathy), which can lead to burns or injuries. B. Clients with diabetes should wear well-fitting shoes to protect against injury. Loose slippers can cause friction, pressure points, or slipping, increasing the risk of foot trauma. C. Cotton socks absorb moisture and reduce friction, helping to prevent skin breakdown, irritation, and fungal infections. Proper sock selection is an essential part of diabetic foot care. D. Feet should be washed once daily with mild soap and lukewarm water, not hot water, as excessive heat can burn skin with decreased sensation. Antibacterial soap is not necessary unless prescribed, as it may dry the skin.