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Which of the following describes how blood helps to maintain homeostasis by working with the immune system?

A: By having white blood cells to attack pathogens
B: By delivering oxygen to cells so they can divide
C: By delivering nutrients from food to cells
D: By carrying waste to the kidneys

User Chakwok
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The answer is A. It's A because when a body is infected by bacteria or viruses, the body must invest a lot of energy to fight off the invaders.
User Mandar Shinde
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