Why did SNCC organize sit-ins

What challenges did political parties face during the election of 1800

What choice describe some of the difficulties john adams faced as president

According to this chart, it can be deduced that, in the period 1881-1890, a) people were no longer leaving countries not northern europe b) asian people maintain their level of immigration to the us c) there was a sharp decrease in immigration from southern europe than in the previous 10 years d) there was a drastic increase in immigration from central and eastern europe than in the previous years