What do the illustration and caption suggest about the power of the mongols?
a. the mongols discourage foreign influences and banned trade with more prosperous nations.
b. the mongols allowed conquered nations to keep their own rulers and did not interfere in their governments.
c. the mongols were unable to maintain their empire after their initial successes, and they returned to the steppes.
d. the mongols were able to conqure large kingdoms, and they installed their own leaders, who obtained global recognition.