Answer:
Option: C. The modern era is characterized by global exchange of ideas and goods, while this kind of exchange was mostly regional during the post-classical era.
Step-by-step explanation:
The post-classical era is characterized by the expansion of the civilizations around Asia and the Middle East with a flourished trading with nearby regions. Where the modern era is known by its connection with the worldwide in terms of interchanging ideas and merchandise, industries and development in the areas of science, technology, politics and warfare.