At the End of Cellular Respiration, Oxygen Combine with Electrons

At the end of cellular respiration, oxygen combine with electrons of a very low energy level. How are the specific properties of oxygen beneficial to the organism that uses it as a final electron acceptor? ​

A) Oxygen is highly reactive and readily accepts electrons.
B) Oxygen is strongly electronegative and helps pull the electrons through the electron transport chain.
C) Oxygen allows a maximum output of energy for ATP synthesis.
D) Oxygen is the only molecule that can act as a final electron acceptor.
E) Oxygen is highly reactive and readily oxidizes methane.