A cellular enzyme catalyzes the catabolic reaction shown below. Its coenzyme is shown in the box. Which of the following is correct regarding this reaction?

A) The substrate is reduced in this reaction and the coenzyme is converted from state 1 to state 2.
B) The substrate is oxidized in this reaction and the coenzyme is converted from state 1 to state 2.
C) The substrate is reduced in this reaction and the coenzyme is converted from state 2 to state 1.
D) The substrate is oxidized in this reaction and the coenzyme is converted from state 2 to state 1.