Where Is Oxygen Reduced with Respect to Complex IV of the Electron

Multiple Choice

Where is oxygen reduced with respect to Complex IV of the electron transport chain?

A) In the matrix itself,but close to a portion of Complex IV that extends into the matrix.
B) Near the inner membrane space side of the membrane on the surface of Complex IV.
C) Near the matrix side of the membrane on the surface of Complex IV.
D) At a site buried in the protein,but connected to the transport of electrons by a line of water molecules.
E) Freely in the hydrophobic portion of the lipid bilayer.