I believe the answer is A, citizeship
Answer:
<em>hi :D</em>
Explanation:
The Immigration Service continued evolving as the United States experienced rising immigration during the early years of the 20th century. Between 1900 and 1920 the nation admitted over 14.5 million immigrants. Concerns over mass immigration and its impact on the country began to change Americans’ historically open attitude toward immigration.
hope this helps u extra .-.
Archduke Franz Ferdinand, Archduke of Austria-Este's assassination triggered WWI
