The base line fitness test is used to determine your current fitness level...true
I would say the answer is C. Hope I helped ^-^
Answer: C, upper thigh
Explanation: if you put it in the stomach, you have a high chance of puncturing an organ, the shoulder and arm would probably take a while to deliver the medicine to where it needs to go, the thigh is a sure place where you won't accidentally puncture an organ and make more problems, and it's a good open area of skin.
The answer to your question is: C. Rollerblading, because it is aerobic with long duration
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I hope this helps!
