<span>C. It allowed for expansion of slavery into the North</span>
C. Conquered most of the civilized world between India and Greece. is your answer.
Alexander the Great was a Macedonian Prince that was able to unify most of Eastern Europe, Greece, all the way to Asia, under his rule. However, at his death, the empire soon split apart between his generals, and was non-existent.
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I believe the answer is: They worried about having to take part in future wars.
At that time, the united states senates prefer to take the position as a neutral force that want to avoid any intervention toward other countries' problems. This stand is taken away the moment the Japanese army decided to initiate an attack to the pearl harbour.
Entrepreneurship. Hope this helps