The Mass Murder/suicide at Jonestown,the Branch Davidian Tragedy at Waco,the

The mass murder/suicide at Jonestown,the Branch Davidian tragedy at Waco,the Heaven's Gate group suicide in San Diego,and Osama Bin Laden's al-Qaeda movement are examples of the use of

A) group compliance.
B) informed consent.
C) the door-in-the-face effect.
D) forced attitude change.