Im pretty sure that it is (A) because blood pumps to get every where through your body. If it didn't one half of your body would feel cold or numb.
The answer is C, I just had this question-
C. To move oxygen-poor blood through the lungs and to move oxygen-rich blood to the rest of the body
The heart pumps blood to two locations: the lungs and the rest of the body. The right side sends oxygen-poor blood to the lungs, and the left side pumps oxygen-rich blood to the body. Therefore, the best explanation for this organization is choice C.
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