7. A man sitting outside a restaurant on a park bench is smoking a cigarette while reading a newspaper. Which answer best describes the mutagen to which the man is exposed? O The newspaper
The cigarette
The oxygen he is breathing
The park bench​

Plzzz hurry im being timed ! humans, like other organisms, require energy for growth and repair. when cells create atp for energy, carbon dioxide is produced as a waste product. how does the body respond to this process in order to maintain homeostasis? a. the digestive and respiratory systems interact to move carbon dioxide to the lower intestine, where it is transformed into methane. b. the circulatory and digestive systems interact to move carbon dioxide to the stomach, where it to break down food. c. the nervous and urinary systems interact to move carbon dioxide to the kidneys, where it is absorbed into the bloodstream. d. the circulatory and respiratory systems interact to transport carbon dioxide to the lungs, where it is expelled from the body.

The condition in which joints are inflamed is bursitis select the best answer from the choices provided ot f

Ineed to know why d is the correct answer asap