The answer to this question will be
C.
outsourcing labor
The Mongols could use either a massive army for battles or use smaller groups for ambushes (like guerilla warfare) as the need arose. Also, the Mongols were very well trained in the use of horses and bows. Also, from childhood the Mongols were taught to shoot and ride.
I think it was <span> over who would control appointments of church officials, a conflict which is sometimes called the Investiture Controversy. Hope this was useful :P</span>
The I in RICE stands for Ice. Hope it helps!!
