Yes you are right. The answer would be C.
Improve physical appearance
That statement is true
Aerobic exercise such as swimming and running will burn a lot of calories from our body
And in order to burn calories, our body need supply of oxygen.
That's why our heart tend to beat really fast when we do Aerobic exercise, it's because our heart need to pump a lot of blood to deliver oxygen to the muscles
Answer: The first step is to step back and ask yourself why you may be reacting.
Explanation: By stepping back and assessing the situation, you may receive insight on why you are acting a certain way. Take a few deep breaths, reflect, and do not hesitate to make a decsion.