I would answer C. -European Crusaders, attempting to win back Jerusalem, enslaved most of the Muslim world.- as the answer.
Answer: Despite its reputation for brutal warfare, the Mongol Empire briefly enabled peace, stability, trade, and protected travel under a period of “Pax Mongolica,” or Mongol peace, beginning in about 1279 and lasting until the empire's end. But Genghis Khan's death in 1227 ultimately doomed the empire he founded
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d. upwards of ninety-five percent of the "Forty-niners" were men.
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