Which of the following factors helps explain the rise of urban centers and the increase in trade in Afro-Eurasia during the second half of the thirteenth century?

This question is incomplete. Here's the complete question.

Which of the following factors helps explain the rise of urban centers and the increase in trade in Afro-Eurasia during the second half of the thirteenth century?

A

The increase in all forms of coerced labor to build housing

B

The decline of the Mongol khanates across Asia

C

The reopening of Indian Ocean trade networks by Chinese explorers

D

The availability of safe and reliable transport along land-based trade routes

D  The availability of safe and reliable transport along land-based trade routes

Explanation:

During the thirteenth and fourteenth centuries, Afro-Eurasia, which covered what are now Africa, Europe, and Asia, developed a trading system through land and water routes, known as the Silk Road.

Concentrated on urban centers, it connected eight geographical regions: the Persian Gulf, Central Asia's Northern Passage, the China Sea, Southeast Asia, the Arabian Sea, North Africa, the Eastern Mediterranean, and Western Europe.

answer; /// slavery should be outlawed in the new country, was part of the initial draft of the declaration of independence, but not part of the final

your answer will be b. improving roads, bridges, and other infrastructure. hope i !