This isn't hard to answer - A; because Japan had so many small, isolated islands, governing the entire country was often very challengin. Imagine being the emperor or just in charge of a country which was composed of hundreds of islands. For your decree to get into motion on all of them, it needed a lot of time.
England (of course) !!!!!!!
George Washington was the first president of the United States in April of 1789
Low wages and taxes caused by the involvement of Russia in WWl