A student builds a model of the heart and brain, shown in the diagram. Two trucks, 1 and 2, travel between the organs. The student will label the trucks with what they are carrying. Which set of labels BEST completes the model? Responses A Truck 1 carries red blood cells and Truck 2 carries white blood cells.Truck 1 carries red blood cells and Truck 2 carries white blood cells. B Truck 1 carries carbon dioxide and Truck 2 carries oxygen.Truck 1 carries carbon dioxide and Truck 2 carries oxygen. C Truck 1 carries white blood cells and Truck 2 carries red blood cells.Truck 1 carries white blood cells and Truck 2 carries red blood cells. D Truck 1 carries oxygen and Truck 2 carries carbon dioxide.