Which of the Following Is TRUE of the Länder

Which of the following is TRUE of the Länder?

A) Regional political parties are significantly different from national ones.
B) There is a strict separation of powers between the federal and Länder governments.
C) They have few powers and are not a significant force in policy-making.
D) They are required to share a portion of their revenues so Länder governments with stronger economies help to support those with weaker economies.
E) The number of Länder change frequently as the federal government tries to give more autonomy to different regions and ethnic groups.