Which innovation from the song dynasty would have the largest impact on the expansion of global empires?

accurate star charts

better navigation tools

chemistry for explosives

horse stirrups

Write a 5- paragraph that explains the three main causes of the overthrow (mahele, reciprocity treaty and the bayonet constitution). say why each was a factor that led to the eventual overthrow. choose one that you think was the most important and explain why. make sure you have a thesis statement in your introduction, and a strong concluding paragraph.