The answer would be a vaccine
Answer:
9Prevention through addressing risk factors
- 9.3. Diabetes mellitus. ...
- 9.5. Indoor air pollution. ...
- 9.6. Alcohol abuse and dependency. ...
- 9.7. Silicosis and other rare chronic conditions.
An experiment should have only one independent variable.
Smoking meth can severely mess you up. Your teeth turn yellow and rot, you age up to 40% faster. Your skin turns rough and very unhealthy. Smoking this will slow your brain down and you will end up with distorted speech. Do not smoke meth, it will kill you.
D; it tightens the airways