What happened to most immigrants when they arrived at Ellis Island? A. They were detained for days or even months.
B. They were released into the United States within hours.
C. They were imprisoned, quarantined, or both.
D. They were returned to the countries they had left.

c.

the answer is c. because I've read a whole book on this

roosevelt believed that in light of the country's recent military successes, it was unnecessary to use force to achieve foreign policy goals, so long as the military could threaten force. this belief, and his strategy of “speaking softly and carrying a big stick,” shaped much of roosevelt's foreign policy.