Which of the Following Is True About the Effectiveness of Shaming

Which of the following is true about the effectiveness of shaming?

A) Effectiveness is often enhanced when the shame is directed not only to the offenders, but also to the offender's collectives (e.g., his/her family, workplace, etc.) .
B) Effectiveness is greatest for those weakly attached to others.
C) Shaming is only effective when done by those who know the offender.
D) The more public the shaming, the less effective it is.