Answer:
Correct answer is A. The Silk Road became stabilized and trade increased
Step-by-step explanation:
A is the correct answer as during this period Mongols controlled this route and even strengthen the trade and movement of people in this region. Even a lot of famous European explorers came to the court of Mongolian ruler, such as Marco Polo.
B is not correct answer as Shintoism was developing mostly in Japan.
C is also not correct as Christianity didn't spread in Mongolia in this period.
D is also not correct as the Mongolians didn't adapted Chinese language.