Answer:
D. multinational state.
Explanation:
War erupted in Yugoslavia, because the country was a multinational state.
The major cause of war erupted in Yugoslavia is because the country was a multinational state as war created territorial conflicts.
War refers to armed conflicts between governments, states, or groups. It is majorly characterized by violence, destruction, etc.
The Yugoslavia wars were a series of ethnic conflicts, independence, insurgencies, etc. The war erupted in Yugoslavia because the country was a multinational state.
Therefore, D is the correct option.
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