A & B Are Married

A & B are married. They have a child C, who is in grade 3 at the West Central Elementary School, Dingras, Ilocos Norte. While inside the classroom, C, stabbed D with his pencil resulting in injuries. Is the teacher liable?

A) The teacher is not liable because the school is not a school of arts and trades.
B) The teacher is liable regardless of the nature of the school but can prove the diligence of a good father of a family.
C) The school, administrators and the teacher are solidarily liable for their negligence.
D) The parents are solidarily liable because of their failure to observe due diligence in the custody of their child, since the parents should be the first teachers of their children.