Citizens are required to be A: born in the United States
B: involved in the military
C: loyal to the federal government
D: members of a charitable organization

I think C, but maybe none of the above. (Depending on the strict definition of "Loyal".  You have to follow Federal laws though so I think it is C.

Explanation:

You do not need to be born in the USA to be a citizen, you can become a naturalized citizen through a legal immigration process, or marriage, or if your parents are both citizens you are automatically a citizen when you are born.

You do not need to be involved in the military to be a citizen.

You can't be against the federal government, or commit treason so I think it is C.

Being a member of a charitable organization is optional and not required for citizenship,

answer; ///i do believe that the correct answer is (d); ///athens had a small population;

- a government ruled by the people, or assembly. officials monarchy - a single ruler like a king. over time some city-states, like athens would change governments. what this means is that all the citizens voted on all the laws.