The answer is B. Development of railroad systems.
Great use with dealing with the spirit world
Framers made several compromises, including the method for counting enslaved Africans for the purposes of population (the Three-Fifths Compromise) and the end of the international slave trade.
There could have been Japanese spies in the US
Because they were afraid that their Japanese citizens will turn on them, the US government was justified in excluding Japanese Americans from certain parts of the country.
Americans and the US military had reason to fear a Japanese invasion
hope this helps
