Awnser and Explanation:
The telegram was considered perhaps Britain's greatest intelligence coup of World War I and, coupled with American outrage over Germany's resumption of unrestricted submarine warfare, was the tipping point persuading the U.S. to join the war.
I would go with Brown v Board of Education. It gave more rights to African Americans and made them one step closer into beating segregation. Through the court case, segregation in schools was deemed unconstitutional, and so was segregation in other public places.
Answer:
C
Explanation: just look at cartels and murder rate in mexico, or the sheet metal villages in brazil.
If that did happen, FDR would've served one more term.
hope this helps