How did the alliance system in Europe contribute to the start of World War I?
Responses

A The alliance system helped nations secure their national treasuries.The alliance system helped nations secure their national treasuries.

B The alliance system was a failed attempt at diplomacy to keep the peace.The alliance system was a failed attempt at diplomacy to keep the peace.

C The alliance system forced great nations to go to war when their allies did.The alliance system forced great nations to go to war when their allies did.

D The alliance system kept nations divided politically promoting hostility.