The most logical cause would be an infection.
most likely cellulitis
The answer is D because of smoking and the smoke fills places and the smoke is dangerous to breathe in. If you are younger than 18 and are using drungs it is against the law to do that. Finnally they increase spread of disease because you could have too much drugs.
hope this helped :)
alisa202
A MUSCLES The movements your muscles make are coordinated and controlled by the brain and nervous system.
