Which of the following is a hazard associated with high explosives like C-4?

Detonation sensitivity is indeed a critical hazard associated with high explosives such as C-4. This characteristic refers to the explosive's susceptibility to initiation by heat, shock, friction, or other means. High explosives like C-4 are designed to be stable under certain conditions, but they are also engineered to detonate under specific stimuli, making understanding and managing this sensitivity crucial for safe handling and use in munitions operations.

In contrast, frostbite is related to extreme cold exposure rather than explosives; flammability pertains more to the burning characteristics of substances rather than their detonation capabilities; and corrosion refers to the degradation of materials over time, often due to chemical reactions, which is not an immediate concern specific to the explosive behavior of substances like C-4. Hence, detonation sensitivity is the most relevant hazard specifically linked to the performance and safety protocols associated with high explosives.