The country that faced a unity crisis due to having a large variety of ethnic groups was D.)Austria-Hungary.
<h3>Which groups were in Austria-Hungary?</h3>
Austria-Hungary was an empire that comprised of several ethnic groups including Serbs, Bosnians, Croats, Hungarians, and Austrians.
These groups wanted independence for themselves and this led to a lot of strife in the empire.
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The best description in terms of how a parliamentary democracy differs from a presidential democracy would be that "<span>C) In a presidential democracy, political power is shared between state and federal governments," since in a Parliamentary government it is more based on districts. </span>
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