The three primary reasons are <em>the requirements for Confederate states to reenter the Union; overseeing the rebuilding of a Southern economic infrastructure; the fate of millions of freed slaves.</em> These were the main issues and hot topics of American Civil War during that time.
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Well, I don't know your options but the thing that comes most into my head are the following:
External locus of control
beliefs on personal control
The answer is "chart junk".
Chartjunk alludes to every single visual component in outlines, charts and diagrams that are not important to grasp the data given on the chart, or that divert the viewer from this data. Cases or examples of unnecessary components which may be called chartjunk incorporate substantial or dull network lines, ornamented outline axes and show edges, pictures or symbols inside information diagrams, and fancy shading.