A. used terror as a weapon and an effective war tactic.
B. gave the inhabitants of cities he attacked the choice of surrendering or dying.
D. used new fighting methods including siege towers, scaling ladders, and catapults.
E. turned his warriors into an army and united the Mongols.
F. commanded his soldiers to fight pretend battles to sharpen their skills.
<span>So, A, B, D, E, and F identifies or explains methods Genghis Khan used to gain power and enlarge his empire. </span>
<span /><span>C.<span>put away his soldier's armor and ruled as emperor. That was Kublai Khan, grandson of Genghis Khan.</span></span>
<span><span>Hope this helps.</span>
</span>