What is true and acknowledges the difference between the islamic caliphates during the Islamic Golden Age compared to the different kingdoms of Europe indeed is that there was a flourishment of science and technology all around the islamic cities while both of these were in a decline during these times in Europe. So D is indeed true.
I assume it's "sordid". Custer and Singleton as people, Hydraulic mining is important but doesn't seem right. Ghost dance is a tradition so it may honestly be Ghost dance or Sordid
