國籍問題請教,謝謝!

加拿大承認多重國籍,美國不. 那麽,是不是申請美國國籍時,一定要declare to give up Canadian Citizenship. 否則,不許入美籍? Having said that, it seems impossible for people to keep both Canadian and American citizenships? 這樣一來,又如何理解 "加拿大承認多重國籍"呢? 是不是這裏的多重國籍不包括中國和美國?

I don't really get this. 還是共產主義好, no need to worry about green care and citizenship.