Answer:
The question is directed to you personally. But I would say:
I will go on 30 min walks at least twice a week or during commercial breaks I'll do 20 sit ups and 10 push ups.
It would be true, as you also can't survive up to 3-7 days without water.
Hypothermia is when your core temperature becomes very low.
I would go with B because I just took the test