Which Statement Is False Concerning Exercise, Free Radicals, and Oxidative

Which statement is false concerning exercise, free radicals, and oxidative stress?

A) Exercise produces free radicals via an electron leak in the mitochondria, probably at the cytochrome level, that produces superoxide radicals.
B) The potential for free radical damage increases during trauma, stress, and muscle damage, and from environmental pollutants including smog.
C) The risk of oxidative stress depends on exercise intensity and the participant's state of training because exhaustive exercise by the untrained more likely produces oxidative damage in the active muscles.
D) If supplementation proves beneficial, vitamin K may be the most important antioxidant related to exercise.