Which statement best describes the influence of the AARP? a. The AARP is small and effective at the local level, but relatively ineffective at the federal level. b. The AARP is a large organization with a significant free-rider problem and thus has little real influence. c. The AARP has millions of members and exerts a significant amount of influence on legislation. d. The AARP is relatively small, but has a strong presence in Washington, D.C. to lobby for certain laws