It would be Alcohol, any drug use,eating unhealthy, smoking,lack of working out, lol basically having intercourse at a young age without any protection, also unintentional injuries or violence.
P.s to prevent most of these all you need to know is right and wrong and if you know these thing can have consequences then don't do them also keep your legs closed , for one of them its important to work out every now and then
With doctors and nurses as well as patients (or parents of the patients) who understand the medical terminology you are using
I think the answer is C because many teens and adults have unsafe lifestyles that lead to injury and death.
The term that describes an illness that affects the mind and reduces a person's ability to function, adjust to change, and get along with others is called, "Mental Disorder".