It summarizes the main point of the essay and tells the reader why that essay is important and worth their time to read.
1. Night of the Long Knives - happened in 1934, it was a series of politically motivated murders.
2.Wannsee Conference - happened in 1942, concerned the final solution
3.Auschwitz opens - in 1940
4.Kristallnacht - happened in 1933, it was a night of Anti-semitic attacks and arrests
So the order is 4, 1, 3, 2
I believe the answer is c.
Generally speaking, it was the "indentured servants" who were considered members of the lower class in colonial society, although shoemakers could be as well, depending on their role in the process.