Answer:
Explanation:edmentum
B. Before the Mongol invasion, China allowed foreigners to serve in its government. After the invasion, only native Chinese could become officials.
C. Before the Mongol invasion, Chinese officials were selected through civil service exams. After the invasion, this system was eliminated.
D. Before the Mongol invasion, China’s government practiced religious tolerance. After the invasion, only Mongol religions could be practiced
C. Before the Mongol invasion, Chinese officials were selected through civil service exams. After the invasion, this system was eliminated is correct.