The Mongol Empire under<span> Genghis Khan started the conquest with small-scale raids into Western Xia in 1205 and 1207. By 1279, the </span>Mongol<span> leader Kublai Khan had established the Yuan dynasty in </span>China<span> and crushed the last Song resistance, which marked the onset of all of </span>China under<span> the </span>Mongol<span> Yuan </span>rule<span>.</span>
The answer is B) a federal system.
I just learned this in gov
Answer: True
I need 20 characters so good luck :)
Answer: Radio broadcasting helped filmmakers discover better ways to capture sound and sync it with moving images.
Since the 20´s and 30´s, when radio broadcasting started becoming mainstream, there were a lot of improvements regarding sound recording equipment, in the form of better quality microphones. That, mixed with the fact that filmmakers started editing sound and post-synchronizing it (instead of recording the sound at the same time that the filming was taking place), has led to a quality increase in the film industry.