Answer:
d) programs in which at-risk teens visit prisons and speak with Inmates
Explanation:
The visit to prisons and speaking to inmates is the right option that would prevent David from joining a local gang despite growing up in an improvershed and crime ridden neighbourhood.
Because, he would be exposed to learn from the experience of those that tow the part of crime and the punishment they are serving. Also, would help him to come to knowledge that local gang and crime does not help anyone.