Which of the Following Is an Example of the Boomerang

Which of the following is an example of the boomerang process?

A) TANs appeal to the nongovernmental organizations in an undemocratic state to pressure their government to change.
B) Exiled citizens become activists abroad and then return home to pressure the government to change.
C) The harsh policies implemented by the authoritarian state backfire by creating mass domestic opposition.
D) Nongovernmental organizations in a state contact transnational organizations,which bring pressure on their government to change policies.
E) A state's criticism of other states' offenses opens itself up to domestic criticism of its own abuses.