The correct answer is a. France. The region was known as French Indochina when it was a French colony - this was the case until 1954, but first independencies came already in 1949
Your answer is B Spheres of Influence
The correct option is D.
The governors roles as commander in chief is to take charge and to take control of the state militia. During the American civil war, the governors of the respective states acted as the main controller of the military forces in their states.
The event that led to this system was the civil war. People had different views than other people, and there was both rich and poor differences as well. Hope this helps!