A teacher should respond to deliberate disruption by helping students examine and improve their behaviour.
- Why D fits: Reflection helps students understand the effect of their actions and take responsibility for change.
- Why the others are weaker: Expulsion or isolation may remove the immediate disturbance without addressing its cause. Authority alone may secure short-term obedience without building self-discipline.
- In practice: Set clear boundaries, listen to the students, and apply the school’s behaviour policy consistently. Serious or repeated misconduct may also require additional intervention.

