C) both a and b
(Although it’s not all blood. There’s tissue and proteins and stuff in there as well).
If the calculator or tablet is allowed then he should take a calculator or a tablet and he should also take his notes so he has a better understanding of what to do
Make sure the scene is safe
The answer is A. ATP I believe because ATP is energy and cells need energy to function so if their is no energy in the blood then the organ or organism wouldn't function properly. Hope this helped you out.