When might collective naturalization take place? (a)when the united states fights a foreign war (b)when a group of children are born in the united states (c)when a group decides to seek refuge in the united states (d)when the united states acquires a new territory

(D) when the United States acquires a new territory.

Collective naturalization occurs when a country acquires new territory from a foreign nation, whether by treaty or cession. As the territory becomes part of the country, the people living in it receive all the rights of citizenship. However, as new territorial acquisitions happen rarely nowadays, it is not a common phenomenon.

can you explain it better

the atm that sounds like it should be the answer