Answer:
A. rise in the status of the nobles
Explanation:
Mongol conquest of China for six decades with the series of military efforts. The Mongols had conquered not only china but many other countries such as China, Persia, and Russia by the end of their period of dominance in the fifteenth century.
But with the invasion of Mongols, it resulted a permanent reunion of China after a prolonged period of political fragmentation. It result into the rise of the nobles.
Hence, the correct answer is "A. rise in the status of the nobles".
