The BEST clothing for exercising in cold weather includes a a shirt, heavy coat, and heavy gloves. b a nylon jacket, several lightweight layers, knit hat, and mittens. c a rubberized jacket and ski mask. d two sweatshirts, heavy jacket, knit hat, and gloves.

The answer id letter d 90 

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other.