I might quit because people are just using me for my points could someone answer this for me? Why does every part of the body need food and oxygen delivered to it?

a. The cells of the body need oxygen to make mitosis and food to make ribosomes.

b. The cells of the body use the oxygen to release the energy from the food.

c. The cells of the body need to make carbon dioxide out of food and oxygen.

d. The cells of the body need food and oxygen for osmosis to happen.