The Action That Brought the German Plan of Attack in the West

Multiple Choice

The action that brought the German plan of attack in the West to an end in September 1914 was:

A) failure by the German quartermaster corps to keep the army supplied.
B) First Battle of the Somme.
C) First Battle of the Marne.
D) First Battle of Ypres.
E) German defeat on the Eastern Front by the Russians at Tannenberg.