A European living in a country conquered by the Mongols would likely have a perspective that reflects the immediate and negative impact of the Mongol conquests. Therefore, the option that best describes this perspective is:
b. The Mongols were responsible for the murder of millions of people in their conquest of European countries.
This perspective focuses on the violence and destruction that accompanied the Mongol invasions, which would be a prominent concern for someone living in a region affected by their conquests.