C makes the most sense to me
This is an opinion question, but I believe that it is possible to seize political control over a country without oppressing the country's people. However, history has shown otherwise (Nazi Germany, British Empire) but we can use past mistakes to improve our future world.
Rationing -since many people were working in the war effort, less people could focus on farming, so there were many shortages.
war bonds - those were used to finance the war effort
women taking over many of men's jobs, such as in factories - this later led to female suffrage.