Think about it, for the first one, blood is primarily made up of water. dehydration is the lack of water. lower volume of water in the body=lower blood volume.
second one, low blood pressure
third one, not sure... sorry
I would say..
B.) One-quarter to one-third.
Good Luck! :)
<span>Environmental I believe is the correct answer.
hope this helps!</span>
This is very very easy its oubvously A.you are pain free
