A1
If you have United States/British/Swiss, etc. nationality, you are legally a member of that country.
Dictionary examples:
My cat has French nationality now. (0.0)
Pizza has Italian nationality, right? (0.0)
My shoes have French nationality. (0.0)
What nationality are you? (8.5)
He did not give his nationality. (9.7)
She is of French nationality. (46.5)
At the International School they have pupils of 46 different nationalities. (54.5)