The Jewish population represented a detrimental part to society. See, the Jews were blamed for the loss of World War 1. Germany was severely embarrassed about all the land in Africa they had to give back and money they had to give. The Jews were a marker to starving and angered Nazi and German population.
Are there option choices or not? if not, it’s an opinion. i think one of the most significant inventions was the cotton gin or the telegraph. without the cotton gin clothes would still have to be sewn by hand. and without the telegraph, cell phones would not be as advanced.
Gunpowder was invented somewhere around 900 in China.
Well, that's basically it... :P