The question being tested is whether or not the human body will produce more red blood cells at higher altitudes.
The hypothesis an athlete would create from this question is that the body will produce more red blood cells at a higher altitude to ensure the pumping of oxygen throughout the body.
B. Sharp mental acuity
Mental acuity refers to being mentally sharp. If you're mentally sharp, you have an excellent memory, and you find it easy to complete different tasks. Lack of sleep can effect this.
The answer is C because idiopathic means a disease that has an unknown cause.
I think it is I went. Not sure though
