I think it's C , hope this helps :)
Answer:
That Germany was researching nuclear weapons.
Explanation:
This letter was written by Leo Szilárd and signed by Albert Einstein, and sent to warn the President of US Franklin D. Rooselvelt in 1932, about Germany developing atomic bombs.
b Roosevelt wanted to change the number of Supreme Court justices from 9 to 15 because he wanted to appoint 6 new justices who supported New Deal programs.