The answer is 1. To protect their plantations. The reason they had to do this was because the Union troops needed to invade and control Southern territories and take out Confederate armies. I hope this helps! ^-^
It was more to prove an example. Many people could not believe that a former slave could appear so educated.
<span>They feared new immigrants would take away their jobs, or drive down the wages by accepting lower pay. They thought they were not assimilating or fitting in with American society. Blamed immigrants for increasing crime, unemployment, called for legal restrictions to stop people from coming to the US</span>