What type of cold-weather injury might Tony have after being exposed to cold, wet conditions?

When considering the effects of cold, wet conditions on the body, trench foot is a specific type of cold-weather injury that occurs when feet are exposed to cold water or dampness for prolonged periods. This condition can lead to damage of the tissues and blood vessels in the feet. It is characterized by symptoms such as numbness, swelling, and a feeling of heaviness in the feet, and it often occurs when individuals are in wet, cold environments without the ability to dry their feet or change into dry socks.

In contrast, chilblains and frostbite are more typically associated with exposure to cold temperatures rather than wetness. Chilblains are caused by sudden warming of the skin after being exposed to cold; frostbite occurs when tissue freezes, often affecting exposed skin areas first. Vertigo, on the other hand, is related to balance and is not a cold-weather injury but rather a condition affecting the inner ear or brain. Thus, understanding the connection between moisture and cold exposure leads to identifying trench foot as the correct answer in this context.