When a Cell "Burns" Food, Electrons Are Released from Chemical

When a cell "burns" food, electrons are released from chemical bonds in the food, and passed through an electron transport chain generating a proton gradient. As the protons pass through an ATPase the energy is used to generate ATP.
-Which of the following are examples of potential energy associated with our food consumption and metabolism?

A) electrons in chemical bonds of food molecules, proton gradients, and ATP molecules
B) electrons moving through the electron transport chain, and protons moving through ATPase
C) protons moving through ATPase by facilitated diffusion, ATP molecules
D) All of the answer choices are correct.
E) electrons from food molecules moving through the electron transport chain, and a proton gradient