the Mongol Empire collapse for a number of reasons. the Mongols were Nomads whose Customs were suited to conquering but not ruling a large empire. the Mongols in distant Khanates were minorities, and many Mongol rulers in these places adopted local customs. Some places such as Russia cooperated with their Mongol rulers but others rebelled and the Empire eventually fell apart.
America had not suffered internal damage like the countries of Europe
American industries took advantage of the supply gap in Europe
The american dollar remained stable and the focal point of world currency
The american nation developed ambitious infrastructure like interstate highway
Out of the following choices, the significance of the plane selections made by the terrorists on 9-11 were that all four planes were traveling long distances, so they had significant fuel on board to burn in the crashes.
The answer I think is C. Photosphere, Chromosphere, and Corona. This order is going from the inside layers to the outside, with the photosphere being the innermost layer, and the corona being the outermost layer. Hopefully this helps