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,

what are the others?

- "the past is made of multitudinous items ranging from anything that can be collected, recollected or assessed to originate in the past. as such, the past is a gallimaufry of particulars that may not have been related in any way. however, the human mind seeks organization to understand concepts and other things. the human mind therefore seeks relationships in explaining and studying the past. history being a humanity, dictates that historians have to serve this human trait by bringing structure to details of the past. historians do this by creating interpretive frameworks that capture as many details as possible."

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