Answer: D, A xinesi
Explanation:
Just had the test and looked back at my answers and got it right.
It was a treaty signed on december 29th 1835 in New Echota, Georgia by officials of the United States government and representatives of a minority Cherokee political faction, the Treaty party
From lakes and grasslands with hippos and giraffes to a vast desert, North Africa's sudden geographical transformation 5,000 years ago was one of the planet's most dramatic climate shifts.
The transformation took place nearly simultaneously across the continent's northern half, a new study finds. The results will appear in an upcoming issue of the journal Earth and Planetary Science Letters.
http://www.livescience.com/28493-when-sahara-desert-formed.html
In the United States immigrant communities became a larger political influence in the early 19th century because of their dramatically increasing numbers. There were a large number of Irish and German immigrants coming to the US at this time due to famine in Ireland and political persecution in Germany. In response to the large influx of immigrants and their potential to influence the political system different groups of Americans took on anti-immigrant or "nativist" views, being strongly against the influx of immigrants and feared that these new immigrants would take their jobs. In response the Know-Nothing Party was formed to opposed this increased immigration politically.
