The correct options are B and C
B) Natural-born citizenship can be determined by location of relationship.
C) Collective citizenship occurs when the U.S. acquires a territory.
For example, a child born in the United States is considered a US citizen. Also, the population of any terrority that is acquired by the US become the citizens of the US. For example, the people of Alaska became US citizen when it was purchased, or the people of Puerto Rico, who cannot vote but are still considered citizens.