Historian Mark Elliot describes the Eight Banner system of the Qing Dynasty, which overthrew the Ming Dynasty and ruled China from 1644 CE to 1912 CE.The Eight Banners, "the most famous of all Manchu institutions," began as an umbrella organization overseeing the mobilization of Qing military forces and the management of many different populations associated with those forces in the forty-odd years leading up to the 1644 Qing conquest... After the conquest, the Eight Banners was retained as part of the administrative structure of Qing government, its ranks restricted to the the original Qing populations and their descendants, exclusive of Han Chinese civilians. …Membership in this caste played a vital role in the maintenance of Manchu ethnic identity and the perpetuation of Qing rule.The Eight Banners was a hybrid institution that combined a range of military, social, economic, and political functions... As a military force, it was the engine of expansion and the mainstay of power during the Manchu takeover in the mid-seventeenth century and even, in a modified way, into the first half of the nineteenth... As a social organization, the banners supervised the affairs of ordinary soldiers and their households, whose every member was registered in censuses taken at three year intervals... everything was reported to the banner, which was also responsible for the welfare of everyone on the these registers and thus deeply involved in both national and local economies.Elliott, Mark C. The Manchu Way: The Eight Banners and Ethnic Identity in Late Imperial China. Stanford University Press, 2006. 39-40.Which of the following BEST expresses the changes in China during the 19th century, a little more than 150-250 years after the founding of the Qing dynasty?Elimination ToolSelect one answerAChina became deeply involved with the global economy.BChina extended territorial control in Eurasia.CChina lost full sovereignty over some Chinese territory.DThe Qing Dynasty controlled the national government.