The impact of Mongol leaders Genghis Khan and Kublai Khan on Europe is best represented by option:
B. They introduced Eastern culture and literature to Europeans.
While Genghis Khan's and Kublai Khan's conquests did not directly result in widespread raids on European cities in the same way they did in Asia, their empire facilitated trade and communication between East and West along the Silk Road. This exchange contributed to the spread of knowledge, culture, and ideas, which included Eastern culture and literature reaching Europe.