I think it is c. They both originated in the Indus River Valley.
The Peace of Westphalia, concluded in 1648 in Münster (Germany), ended the Thirty Years War, which started with an anti-Habsburg revolt in Bohemia in 1618 but became an entanglement of different conflicts concerning the constitution of the Holy Roman Empire, religion, and the state system of Europe.
Having a weak government can lead to failure of a country
The oil fields would enable Germany to fuel their air forces, making them harder to defeat.
