Use the Accompanying Figure to Answer the Following Question(s)

Multiple Choice

Use the accompanying figure to answer the following question(s) .
-The accompanying figure shows the electron transport chain. Which of the following is the combination of substances that is initially added to the chain?

A) oxygen, carbon dioxide, and water
B) NAD+, FAD, and electrons
C) NADH, FADH2, and protons
D) NADH, FADH2, and O2
E) oxygen and protons