If Dan is using a drug that is very dangerous because it increases his risk for self-harm thoughts, then this drug is Marijuana (Option D).
Marijuana is a depressive drug that affects the central nervous system of the person and generates addiction.
Marijuana is very harmful because this drug can increase the risk for self-harm and self-destructive behaviors.
In conclusion, if Dan is using a drug that is very dangerous because it increases his risk for self-harm thoughts, then this drug is Marijuana (Option D).
Learn more about Marijuana here:
https://brainly.com/question/8354517
#SPJ1