C he was impeached because of lying and stealing.
Definition of imperialism
imperial government, authority, or system
the policy, practice, or advocacy of extending the power and dominion of a nation especially by direct territorial acquisitions or by gaining indirect control over the political or economic life of other areas
broadly : the extension or imposition of power, authority, or influence
<em>Hope that helps!!!</em>
Sparta's policies were the most harsh and strict so it's D. Sparta