While collecting data from a client who has a cast on his right leg, a nurse locates an area on the cast that feels warm to the touch. Which of the following findings should the nurse identify as a complication to the client's condition?

A. Uneven cast drying can cause warm spots, but this is expected only in the first few hours after application; a set, dry cast should not feel warm. B. Pressure from the cast can cause pain, skin breakdown, or impaired circulation, but it does not usually produce warmth. C. A localized warm area on a dry cast can indicate infection underneath the cast, often accompanied by odor, drainage, or client complaints of pain. D. Poor circulation is associated with coolness, pallor, or numbness distal to the cast, not warmth.