The treaty of Versailles blamed the Germans for causing the war, even though it was the Austrians who started the war. The answer is that the allied powers blamed The Empire of Germany.
It was bad for the nation
Well, strictly speaking none of the options are correct.
This is a metaphor, and a metaphor for a country. It was originally applied in 1830s-1850s (within this period, we are not sure when) to what is today Turkey, but was known as the Ottoman Empire back then - so the answer is B.
recently it was used for Greece, too.
I believe it is B, but I know for sure it is not A, I can try and leave some links for you to get more info on it