The answer is A, becuase it's the only one of them didn't colapse
Bagaimana pula dengan Hari Guru?
I believe the answer is China. Hope this helps
The information that Zhang Qian brought back encouraged Han Wudi to destroy the Xiongnu and lay the foundations for the "<span>c. Silk roads," since it was now known that these would greatly expand the Chinese economy. </span>
It sounded good to my ears