The correct answer would be A.
The anwser to your question would be an monarchy
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The correct answers are:
If Bulgaria attacked Turkey, then Russia would come to Turkey’s aide and draw them into the war as an ally. - This was a way to preserve Turkey’s neutrality during the war.
Britain and the US would establish a second military front - In June1944 the second front was created and it took the pressure of the Red Army so they could make progress into Germany’s territory.