Islamic armies conquered major cities to help spread islam on three continents.
I would say c limited slave trade between Africa and the colonies :)
The answer to this question is letter c
With the end of the Civil War came a great transition into a mechanized and factory-based economy, which took workers away from the farms and put them into the factories. Many people saw this is corporate great, which was in some ways true--this led to the formation of many unions and workers organizations.
