Mitochondria maintained the essential genes ________ from the ancestral endosymbiont from which they evolved.

A) NADH dehydrogenase, cytochrome oxidase, and ATP synthetase
B) pyruvate dehydrogenase, citrate synthase, and fumarase
C) hexokinase, phosphoglucose isomerase, and phosphofructokinase
D) photosystem I and II and ATP synthetase
E) catalase, superoxide dismutase, and peroxidase