Which One of the Following Best Explains Why Humans Must

Which one of the following best explains why humans must constantly breathe in oxygen in order to stay alive?

A) Oxygen is an important source of energy for cells and is used to make glucose.
B) Oxygen is essential for the production of most of the ATPs required to fuel cell functions.
C) Oxygen must be available to cells in order for them to make the sugars necessary to supply energy for cell functions.
D) Oxygen is used to drive the anaerobic breakdown of sugars for the production of ATP.
E) Oxygen is converted to carbon dioxide, which is then used to drive the production of ADP.