The best explanation of dual citizenship in the United States is:
The U.S. permits dual citizenship for naturalized citizens from other countries.
This is accurate because the U.S. does allow individuals to hold citizenship in another country in addition to their U.S. citizenship, particularly for those who acquire U.S. citizenship through naturalization. However, it's important to note that while dual citizens are subject to U.S. laws and may have obligations such as taxes and jury duty, the contours of citizenship can be complex and vary based on individual circumstances.