Six-Year-Old Timmy Was Misbehaving in Class One Morning

Multiple Choice

Six-year-old Timmy was misbehaving in class one morning. Which punishment is likely to be the MOST effective in preventing Timmy from misbehaving again?

A) making Timmy stay after school
B) making Timmy sit in the corner
C) taking Timmy aside at lunchtime and asking him to stop misbehaving
D) giving Timmy a warning, and making the punishment more severe if he misbehaves again