Carbon monoxide injures cells by a. crystallization of cellular organelles. b. promotion of free radicals. c. reducing oxygen level on hemoglobin. d. destruction of cellular membranes.

c. reducing oxygen level on hemoglobin.

Explanation:

Carbon monoxide, whose chemical formula is CO, is an odorless, colorless, flammable and highly toxic gas. It can cause death when breathing at difficult levels. It occurs when combustible materials such as gas, gasoline, kerosene, coal, oil, tobacco or wood are burned in low oxygen environments. Fireplaces, boilers, water heaters and household appliances that burn fuel, such as stoves, can also produce it if they are not working properly. Vehicles stopped with the engine running also fire him.

Carbon monoxide modifies the amount of oxygen available to cells, which hinders cellular function.

Carbon monoxide binds tightly to hemoglobin preventing the red blood cell from carrying adequate oxygen, leading to hypoxic injury. Other chemicals such as carbon tetrachloride promote free radicals, which injure cells and destroy cellular membranes.

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a