Respuesta :
Answer:
(I'm sorry, I got stuck between a and b. This was the best answer I could come up with)
Explanation:
Capillaries are meant to be small so blood cells could move through them in a single file line. If they were an bigger the blood stream would clog up and most of the blood cells won't be able to give nutrients or exchange gas
In the case when the capillaries had thick walls and large diameters so for this option b is correct.
What are capillaries?
Capillaries are to be treated as small, thin blood vessels that should be linked with the arteries and the veins. The thin walls should permit the oxygen, carbon dioxide, and waste products for passing from the tissue. It is to be treated as the small so here the blood cell should be moved via them in a single file line.
Therefore, option b is correct.
Learn more about cells here; https://brainly.com/question/19733528