I think it would be command hope this helps
Answer:
D
Explanation:
Seperation of powers is the seperation of the powers into 3 branches
The doctrine related to public education which was overturned by the Supreme Court decision in Brown v. Board of Education was the policy of B) separate but equal. This doctrine was overturned by referencing the equal protection clause of the Constitution which argued that equal protection of the law was afforded to all citizens regardless of race.
Well there are two ways of really explaining this, but "The Common Good" by definition is something that benefits or interests of everyone.
The political term, is literally the same thing; "What is shared and beneficial for most members of a given community"
Hope this is the answer you are searching for.