If Oxygen Is Unavailable, Predict What Happens to the Citric

If oxygen is unavailable, predict what happens to the citric acid cycle.

A) It stops because the supplies of NAD⁺ and FAD become depleted.
B) It stops because ADP levels increase in the absence of oxygen.
C) It continues because none of the reactions in the citric acid cycle require oxygen.
D) It continues because ATP levels are low, and low ATP activates enzymes of the cycle.