I believe it’s B. Because pesticides aren’t really helping the environment.
I would say a because he ran too much but that would be just me I think he hurt his knee from running too much more exercise but probably just aggravate his condition I could be wrong but this is what I think
1. asthma
2. lung cancer
3. COPD (Chronic Obstructive Pulmonary Disease)
4. pneumonia
5. autism
