I would say C because you always need to ask a professional before attempting to begin an exercise program.
I believe the answer is A. Achieving all of the above results.
Reason being because you need a certain amount of oxygen to support your muscles in every activity or your body will shut down.
Answer: This is an example of <em>tolerance. </em>
Explanation:
When a person has tolerance that means that they will need more of the substance to get them to same level as before. Many people grow an tolerance to certain prescription drugs, drugs, etc. A doctor can prescribe a new medicine or up dosages to help the patient not use more of the medication than prescribed.
For Tayla, this means she will have to have more of the substance to achieve the level she had before.
