Respond to one of the following questions about the Reagan Revolutio or The End of the Cold War

Why does this historical time/event/content matter?
How does this time/event/content still have effects today?
How does this time/event/content affect your understanding of US History?
To what extent did the US “make progress” during this time/event/content?

10 points per question and brainlist 1. name four of the ruling dynasties of china. describe at least three contributions to society from each dynasty. 2. why did the qin ruler zheng burn chinese literature and philosophy books? how did the han dynasty establish a strong and effective government? why did people rebel against the sui rule? 3. what new technologies were invented during the tang dynasty and fully developed in the song dynasty that would eventually have a great impact on the world? explain why this technology had such an impact. 4. who were the invaders that seized control and took over the song dynasty? 5. how was china's history affected by its policies of isolation from the outside world during the ming dynasty?