Which of the Following Is Not a Reason for the Growth

Which of the following is not a reason for the growth and diversity of interest groups in the United States?

A) A political culture that values the right of association and citizen organizations
B) A decentralized government structure that provides many access points
C) A lack of unified and responsible political parties
D) The increasing complexity of American society
E) The breakdown of the traditional two-parent nuclear family in the United States