He was able to utilize interchangeable parts to make is plows more efficient. He started using iorn as his material for building plows. Since iron was heavier it was easier to dig into the soil.
Answer:
C. Saint-Domingue's independence is granted following the French
Revolution
I'm not sure but I'd say because of Japan, Japan more or less did not get involved in many wars as far as I know. I know that Japan had no reason to go against Korea but still did and sided with China/North Korea. Because of that a lot of hate came from that and since then even sometimes now South Koreans are not very fond of Japanese.
Also I hope no one takes offense that's what I know I'm not saying all Koreans hate Japanese just some...
Hope this helps
A case decided by the Supreme Court of the United States in 1857 and seen as a landmark decision in the debate surrounding the constitutionality and legality of slavery.