The answer is B) autocracy.
rep. gov. would be a democracy
oligarchy has multiple rulers
Democracy:
People choose their leaders.
Laws are framed to protect the civil rights of the people.
Communism:
People have no say in the government
The government controls the social and cultural life of people.
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This is of course a very subjective question, but most would argue that it is rather reasonable for the EU to have been slow to meet its energy goals, since it is dealing with a large number of separate countries with different emissions patterns.
They are called the tectonic plates... that's what causes earthquakes.