It Has Been a Long Time Since Karina Stopped Bullying

Multiple Choice

It has been a long time since Karina stopped bullying other children at school. Her parents simply explained to Karina that every time she bullies a child, she must pay a price for the bullying incident. Karina loves music and has an extensive CD collection;
Therefore, the cost of a bullying incident is three CDs from her collection. It did not take Karina long to determine that it was too high of a price to pay for her behaviour, so the bullying stopped. This response cost method of modifying behaviour is a:

A) corporal punishment
B) positive reinforcement
C) negative reinforcement
D) punishment technique