I believe it's either microwaves or x-rays
I studied this last year
The answer you are looking for is B.
Glucose is one of the most important sugars in your body. It is used for a wide variety of tasks including the production of ATP, which powers our cells.
Well due to it being cold there could be two reasons, 1. Your skin is reallyyyyy dry, 2. When your capillaries expand, the surrounding nerves become stimulated and then sending messages to the brain