One major effect of the Lowell system was that young women were given the possibility to work and to gain financial independence.
The Lowell System was a labor production model. With that system the manufacturing activities were in charge of young female and they worked under a roof.
The Jim Crow era directly followed the Reconstruction period in the United States history. The name Jim Crow comes from a white actor who portrayed a dim witted black slave in the 1830's. Jim Crow is used to describe segregation laws, customs, etc.
The answer would be B, i hope this helps, good luck.