Answer: basketball and football
The answer to the question above is letter "C. enables humans to live forever". Human beings, as we are, we are bound to face death when time comes and that we are not immortal. Other choices are beneficial uses of the genetic engineering.
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