We breathe more quickly and deeply when we exercise. Why does this make sense? (Select all that apply.)

-Because when we exercise, we consume more CO2 and must increase ventilation to supply the CO2.
-Because when we exercise, we produce more CO2 and increased ventilation is necessary to rid ourselves of CO2.
-Because when we exercise, we hydrolyze more ATP to ADP and Pi, and O2 is necessary for the hydrolysis, so we increase our intake of oxygen.
-Because when we exercise, we use more ATP, and additional O2 is necessary to generate sufficient ATP.