I would say building resilience is the answer that makes the most sense as seeing its the only thing that effects your health positively.
Answer:
You've already said you figured it out, but might as well answer for the points and anyone else that needs help. C, Tissue damage, is what you need to prevent.
Explanation:
Frostbite is a serious condition that can lead to the loss of limbs. Frostbite can be prevented by keep your hands and feet warm.