The best answer choice from the choices given would be B; The style of propaganda used by the Nazis implied that violence would be used against all peoples who hindered their efforts.
1291 is the answer to number one, ill get the rest in the chat, I'm out of time
This is important, because this lead to more trade routs with other countries, and this strengthen the empire as a whole. These roads also lead to more connections to cities, and lead to more homes, and overall improved their society as a whole.
Maybe there were no cures, vaccines, or antibodies at the time. Medicine was never completely discovered for centuries to come, which is why the Black Plague occurred during the medieval/Middle Ages.