Anyone who is born in the United States or an associated territory or possession (such as Guam or Puerto Rico) is automatically a citizen. Anyone who legally immigrates to the US can apply for citizenship after 7 years residence.
She can, but she will have to give up her US citizenship, not a good idea.
US and UK allow Dual citizenship. A person can be a US citizen and a citizen of UK if he/she desires to. But if a person applies to get naturalized as a citizen of UK when he/she is already a US citizen, then it will lead to losing US citizenship.So a person can have US & UK citizenship as long he/she is not a naturalized citizen of UK.
Its possible
The minor child of a US citizen is always eligible for US citizenship. The child might also be eligible for Thai citizenship since he was born there.
citizenship
There is one and only category that is US citizen. Through the naturalization process using the USCIS Form N-400 or as citizen by birth to US citizen parent the citizenship can be obtained.The Form N-600 can be used to obtain the US citizenship certificate as proof for citizenship.
By naturalization or by marrying a Montenegrin citizen, but there is no birthright citizenship!
If you are a citizen of Rome, you have Italian citizenship, with all the rights and privileges that Italian citizenship encompasses.
Only if the other country does not ask you to renounce your US citizenship (e.g. Norway, Denmark, Spain and Luxembourg require you to renounce your US citizenship if you want to obtain their citizenship).
Yes, you can apply for German citizenship and be a dual citizen regardless of the fact if your mother was still a German citizen or not.
No. The US 'officially doesn't 'recognize' additional citizenship(s) a US citizen may have.
No. Neither will automatically become citizen of the other country.