Why was the mongols' sheep-based economy unstable?
a. droughts and long winters sometimes ravaged the herds.
b. inbreeding caused the herds to weaken and die out.
c. chinese raiders often stole entire herds of sheep.
d. other nations would not trade for the mongols' sheep

Why did brigham young lead a group of 150 people out west? a.) he was a freed slave who wanted to create a community among other freed slaves. b.) he was a mormon leader who wanted to escape religious persecution. c.) he wanted to establish a fur trade with native americans in oregon country. d.) he was a catholic missionary who wanted to establish catholic missions in the west.