Answer:
CDC is the correct organization .
Answer: you can tell if they are limping or walking strange and or have a swelled up ankle they probably sprained it if you are unsure you can always ask an adult or professional for help.
The correct answer is B. controlling the flow of blood to the skin
The more blood there is, the more heat there will be because of blood. An easy example is when someone's ears get all red due to a blood rush to the ears. At that time, ears are also very warm.
