Answer:
a. Germany had to take sole responsibility for the war.
Explanation:
Under the treaty of Versailles signed after the end of World War 2, Germany was required to face certain punishments under the terms of the peace agreement. The most important being t hat they(germany and all allies) accept responsibility for causing all the loss and damage. This later became known as the War Guilt clause, requiring Germany to disarm, make territorial concessions, and pay reparations to certain countries that had formed the "Entente" powers.