Which of the Following Statements, If True, Would Confirm the Idea

Which of the following statements, if true, would confirm the idea of pluralism?

A) The number of interest groups in Washington, D.C., has decreased over the past several decades.
B) Elected officials rarely take into account the views of interest groups.
C) Business/economic interests have more lobbyists in Washington, D.C., than other types of organizations.
D) Elected officials seek out the opinions of multiple interest groups when creating policy.
E) Membership in labor unions has remained stable over the past several decades.