What was the norths main goal in fighting the civil war?

Plz 50 points answer only if you know and don't copy answer describe how the geography of the korean peninsula affected where people settled and how they lived.

Which statement best describes a significant cause of world war ii? o a. the economic boom that followed world war i allowed countries to build up huge militaries. o b. the treaty of versailles, which ended world war i, left lasting resentments in many countries. o c. the rise of imperial states in asia caused european powers to unite for their common defense. o d. the league of nations encouraged european states to form secret military alliances.

What new weapon made allied leaders worry about the cost of invading the japanese mainland?