Answer:
it's the first and the last one
Explanation:
cuz I smart
The reason why that the United States insist on a broad definition of neutrality after Worl War 1 broke out in 1914 is that because the nation benefited financially from such an expensive interpretation. Arguing that neutral nations should allow to trade freely with belligerents, send ships through the seas. Keeping America's European trade was the very important in 1914.
The author of this famous letter was C. Albert Einstein. Einstein knew that the technology was possible, and that the science behind the bomb was credible. Nobody knew if the Germans had started yet (they had not), but Einstein urged to US to begin research anyway.
No they were not. The U.S promised that they wouldn't hurt the Natives, but ended up massacring many<span />