The Mississippi River System, also known as Western Rivers, was important to trade and transportation in the west. It played a very important role in the lives of those people who inhabited the surrounding area. It was for transportation and also for trade.<span> </span>
The southern colonies' economy had growing labor demands
This is because the South's economy relied on the agriculture, which required more physical labor than the industrial factories the North relied on.
Your answer would be A because the Emancipation Proclamation only freed the slaves in the south until the South decided to come back to the US.