Increased Carbon Dioxide Triggers an Increased Breathing Rate,so How Does

Increased carbon dioxide triggers an increased breathing rate,so how does this relate to a potential oxygen demand?

A) Increased carbon dioxide is the product of increased cellular respiration.
B) Increased cellular respiration requires increased oxygen.
C) Increased carbon dioxide is controlled by the pH of the blood.
D) Both increased carbon dioxide is the product of increased cellular respiration and increased cellular respiration requires increased oxygen.
E) All of the answers are ways the two are related.