Which Statement Best Describes Special-Interest Groups' Power

Which statement best describes special-interest groups' power?

A) It is generally stronger at the state and local level than in Washington, D.C.
B) It is generally stronger in Washington, D.C.than at the local level.
C) The type of special-interest group is the deciding factor in whether it is stronger at the state and local level than in Washington, D.C.
D) Thanks to campaign reform laws, the strength of special-interest groups has been greatly diminished at both the state and local level and the federal level.
E) Special-interest groups have never been particularly powerful in U.S.politics, either at the state and local level or the federal level.