Answer:
I do not know why he keeps answering you
Answer:
D
Explanation:
Because you need to check before you go and also I just took the test
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.
The answer is true because I used to play tennis
