Examine the Following Figure

Examine the following figure.
-Examine the structures of following two compounds. Each shows the biologically operative part of the molecule. Which of the following does not correctly characterizes both compounds

A) Both require two electrons for reduction.
B) Both require two hydrogen ions for reduction.
C) Both compounds upon reduction produce electron-transporting molecules.
D) Both are classified as coenzymes.
E) All of the above are correct for both compounds.