Kelly is 32 years old and has a history of substance abuse and committing crimes. he drank at 10 and started using marijuana at 13 and experimented with a variety of drugs over the years. his family was violent and criminally inclined. he grew up in a lower-economic neighborhood where crime thrived. kelly dropped out of school at 16. what factor does not seem to play a role in why kelly turned to drugs? a. family b. problem behavior c. social disorganization d. genetics