29. A firefighter is brought to the emergency room (ER) from the scene of a fire, and he complains of headaches, weakness, confusion, and difficulty in breathing. His skin and mucous membranes appear very pink/red. The causative agent of these symptoms inhibits electron transport and oxidative phosphorylation by which one of the following mechanisms? (A) Uncoupling of electron transport and phosphorylation (B) Combining with NADH dehydrogenase (C) Combining with cytochrome oxidase (D) Combining with coenzyme Q