Answer:
A. Blood is responsible for helping us digest food.
Explanation:
First off, imagine what that'd be like if you get a cut and your blood had digested food in it. Gross. But seriously, the other three options are true facts. What does help us to digest food, is bacteria, and other parts of the digestive system.
Something to remember is that blood has to do with cells like red blood cells and white blood cells for instance. There is both oxygen-rich and oxygen-poor blood which all goes on around the lungs.
Hope that helps and have a great day!
