Answer:
Option: B. Russian princes fell under the control of Mongol rulers.
Step-by-step explanation:
Mongol invasion of the Kievan Rus began in the 13th century AD, which destroying numerous cities, including Kiev. The Mongols eventually captured, sacked, and destroyed the centre of Kievan Russia. The Russian Princes were under the authority of Mongol rulers who they paid taxes and tributes.