Which of the Following Is True of Transnational Advocacy Networks

Which of the following is true of transnational advocacy networks (TANS) ?

A) They are able to achieve results only when able to directly apply significant economic pressure to states.
B) They always serve purposes that are widely agreed to be normatively "good," such as protecting human rights or the environment.
C) They tend to have a clear hierarchical structure,with members taking clear direction from a strong central leadership.
D) They are characterized by back-and-forth reciprocal interaction in which members voluntarily share information and political strategies.