Answer:
B. Look for a counselor, family therapist, or pastoral counselor who can provide effective support. or D. Switch from an authoritative to authoritarian parenting style.
Step-by-step explanation:
you cant ground someone to go back to normal.
they must need help or something happened at school, and it somehow affected it, so talk with a counselor.
if you try to talk some sense into him- it'll probably get worse, considering he has changed and stopped talking to him.
my parents switch to an authoritative parenting style and it kinda has helped me, also, he will need to listen to them, and when he's at his weakest- he might break, so then he may tell you the problem.