the following is true about the souths war effort
hope this helped!
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be the "railroad," since rail travel allowed for people and supplies to move to the west at an unprecedented pace. </span></span>
Learned from there mistakes and try to not repeat the same mistakes they've made
The answer is trade barrier.
thx