During 1914 - 1918 the most destructive war in history the World war I occurred. The militarism and the political extension caused the war starting from the nations of Europe.
The correct option is:
Option b. Unrestricted submarine warfare against neutral shipping.
This can be explained as:
- The Great war started in 1914 because of the assassination of Franz.
- The war had a great impact on the economy and damaged many countries.
- Europe suffered a lot because of the war and had to pay huge reparations.
Therefore, warfare happened against shipping.
To learn more about affect of World War I on Europe follow the link:
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