Answer: I think it C, but B makes sense too. D also seems like a good answer. But I also want to choose A
Explanation:
Isolationism was the policy that kept them from joining the League of Nations. Isolationism is when a group stays away from or ignores all people in that group. Mainly political matters of other countries.
Answer: (C) borrowed technology from railroads.
Explanation: Edge 2021
it was the Last Patriots Stronghold in Manhattan