Oxidation and Reduction Reactions Are Typically Linked Within a Cell

Oxidation and reduction reactions are typically linked within a cell. They are part of most matter and energy transformations necessary for vital life function.
-Oxidation-reduction reactions

A) remove protons from one molecule and join them to another molecule.
B) remove electrons from both molecules involved.
C) remove oxygen from the cell.
D) never occur at the same time.
E) occur simultaneously.