Answer:
Ask each friend to explain himself, the choices he has made, why they were bad choices, and what can be done in the future to not make the same choices
Step-by-step explanation:
The second answer is also viable but the others don't seem logical. Seeing as if you were to place yourself in the situation of his friends I doubt anyone would want to get yelled at and told that yelling at them was the only option. Also the first answer allows you to see things from others' point of view and will solve any potential problems in the future from occuring.