My best bet would be the very first option; Termujin or <span>Genghis </span>Khan<span> (he was born Termunjin but changed it) was very charismatic and gave promises of vast expansion and invasions which was accomplished. </span>
The unification of Mongol tribes by Termujin led directly to the formation of the Mongol empire. Option A is correct.
The Mongol empire was founded by Genghis Khan in 1206. It streched from the Pacific Ocean in the east to the Danube River and the shores of the Persian Gulf in the west. It became the largest contiguous land empire in history. The Mongol Empire arised from the unification of several nomadic tribes in the Mongol homeland.
Andrew Jackson's battle at New Orleans was unnecessary because the treaty of Ghent, which ended the war, had already been signed two weeks before hand.
Yes Napoleon did sell the Louisiana territory to fund his military advances but he also knew that this territory was too much of a hassle and too difficult to defend.