Which of these topics is appropriately narrowed for student research?
Aa history of U.S. immigration
Bcauses of the current U.S. immigration crisis
Cthe U.S. as a nation of immigrants
Dhow naturalization happens
Aa history of U.S. immigration
Bcauses of the current U.S. immigration crisis
Cthe U.S. as a nation of immigrants
Dhow naturalization happens