The answer is source B because it has a listed author who is an expert and it is the governments organization website which are more reliable that a .com website. Source A does not even list the author so you do not know who wrote it could be anyone.
Reviving ache as, pains, cramps, and making you feel better when don't or sick.
So you won't sprain any muscles or hurt yourself.
Hey There!
cardiorespiratory endurance is how long you can do a activity without taking a break.
Hope this helps!
