The answer to your question is D. It establishes. Hope this helps!
Answer-
Everyone disappeared without a trace in 1590, and only left behind 2 clues: "Croatoane" carved into a gatepost, and "Cro" carved into a tree. No one knows what really happened, but their are theories that they were attacked by local native american tribes.
The completion of transcontinental railroads in the United States and Canada
Answer:
Xinhai Revolution or 辛亥革命
Explanation:
There were multiple revolutions during the Qing Dynasty, such as the Revolt of the Three Feudatories, White Lotus Rebellion, Eight Trigrams uprising of 1813, Taiping Rebellion, Nian Rebellion, Du Wenxiu Rebellion, Dungan revolts, and the Boxer Rebellion. This was to be understanded - the Qing were of the Manchu tribe - not of the Han, and so the Chinese do not like them much. However, the Qing have supressed them all, until the Xinhai Revolution. There were two main reasons why they were succesful: the Qing was weak, foreign countries are all coming in and trying to get a piece of China. Another reason was their equipment was far more advanced then most other rebellions during the Qing: they had Western guns and bullets. So that was why they were so succesful.
They were called Roundheads
