Which One of the Following Is the Major Reason Why

Which one of the following is the major reason why assigning extra schoolwork is not an appropriate punishment for classroom misbehaviour?

A) It gives students the message that class work is an unpleasant task.
B) It decreases the likelihood that students will do their assignments appropriately.
C) It asks students to perform tasks without the scaffolding they need for completing those tasks successfully.
D) It is negative reinforcement rather than punishment.