Answer:
A convention is an agreement between 2 countries helping over a particular problem, less formal then a treaty . Also a convention is a gathering where people meet and discuss a problem or similar interests.
They are happy because the huns were good people so they were not worried about being force to doing cetrain things
Correct me if I am wrong but I believe it was by building up their military forces, they increased industrial production and lowered unemployment. It was only a temporary success.
The answer is A
i'm filling out character space now