The Answer is A
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desire to engage in an activity that is easy on their joints
Because the rest of the answers deal with high intense exercise that really gets into the muscles and bones while mild exercise would be stretching and walking.
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Nutrients and oxygen is the answer because the circulatory system does that work and the other one is from another system
Uncomfortable or squeezing chest pain, back pain, pain in arm(s), lightheadedness, shortness of breath, sweating.
