Answer:C. a time out.
Explanation:
Time-out is a technique used to discipline children by isolating them from their favourable places into a non favourable place or boring place for some minutes after they have behaved in an undesired manner.
Time out literally means a child is timed out from any attention from others.
Both teachers and parents use this technique to encourage a good behaviour by discouraging an undesired one without having to tell at a child or hit a child.
It can be used to discourage temper tantrums and other unacceptable behaviours from children.
For time out to be effective consistency is crucial.