Because they help each other and became wealthy
B i think∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵∵ ∵∵∵∵∵∵∵∵ c∵∵∵∵∵∵
Definition: Traditionally, the term "international conflict" referred to conflicts between different nation-states and conflicts between people and organizations in different nation-states.
Hey!
Hope this helps...
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I do not believe there is the right reason for any country to go into war. Although if I had to pick one reason that a country might go into a war, or a reason that could be justifiable for going into war. My decision would be going into war to protect an ally from an invasion.
This is not because of the thought of war, this is because if a country lose his allies, it would be defenseless when war is thrust of the pawn that country who needed that Ally.
So i would say the answer is: B.) to protect an Ally from an invasion.