How does a proper warm up affect blood flow?

"Blood flow increases" is the one way among the following choices given in the question that a proper warm up affect blood flow. The correct option among all the options that are given in the question is the first option or option "A". I hope that this is the answer that has actually come to your help.

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During a proper warm up the heart beat rises, allowing more energy to go to your muscles. This increases blood flow through the body.

Its either c or d. i would go with d though, because im not sure if its legal in all of the us

Ithink its part b hope that