1. 古放弃美国国籍在她18岁前。通常,Renunciation is irreversible.
However, once you renounce, it's done. Getting back your citizenship will be irrevocable and irreversible. The only exception to getting back U.S. citizenship is if you renounced before age 18.
2. 古现在不公开澄清国籍的争论对美国中国观众都伤害最小。她一定有律师(们),不会犯美国和中国法。她应该也有公关团队,有些东西可能不讲那么一清二白最好