Which of the following describes a similarity between the Islamic Empire and China's Tang dynasty during the postclassical era? A. Both engaged in widespread persecution of ethnic and religious minori

Which of the following describes a similarity between the Islamic Empire and China's Tang dynasty during the postclassical era?

A. Both engaged in widespread persecution of ethnic and religious minorities.

B. Both experienced periods of economic depression following the fall of powerful leaders.

C. Both isolated themselves from the rest of the world to protect their own cultures.

D. Both spread their cultures internationally by establishing valuable trade routes.