Answer:
you should never stop strecting
Explanation:
because it can mess up your body and you can get cramps
Answer:
so that you can find a match for their blood type.
Explanation:
Certain blood types don't react well with others and cause their immune system to attack, while other blood types react fine with a certain one. Group o+, for example, can donate to any + blood type.
It requires all but a persons D. Written consent.