What Do the Authors of the Text Mean When They

What do the authors of the text mean when they suggest clientele agencies provide "functional representation"?

A) Clientele agencies are held accountable by their clients if they fail to represent them properly.
B) Clientele agencies learn the interests and needs of their clients and then advocate for them in Washington.
C) Clientele agencies are composed of individuals that match the characteristics of their clients.
D) Clientele agencies serve as trustees and do what they think is right for their clients,regardless of the clients' expressed interests.
E) Clients vote for members of the clientele agency to ensure they adequately represent the clients' interests.