The correct answer is <em>A). Setting up schools systems</em>.
States have the faculty to set up school systems. On the other hand, States are not able to coin money or regulate commerce. These activities are under the jurisdiction of the federal government. And with respect to declaring war, it is a competence of federal government.
But states can focus its educational efforts to improve the school systems and grant opportunities for a better education.
Because it is the state within the state. Vatican is a state which is governed by the Pope.
It resulted in the deaths of 1.5 to 2 million people from 1975 to 1979, nearly a quarter of Cambodia's 1975 population ( c. 7.8 million).
