Why Was the Ruhr Area Significant to the Germans

Multiple Choice

Why was the Ruhr area significant to the Germans?

A) The area was unjustly ceded to France in the Versailles Treaty.
B) The area was the symbolic heart of the German nation.
C) The area was the main agricultural sector of Germany.
D) The area was a buffer zone between Germany and Switzerland.
E) The area was Germany's heartland that produced coal and iron.