"Emperor Zhengzong, being deeply concerned with agriculture, came to know that the Champa rice was drought resistant and that the green lentils of India were famous for their heavy yield and large seeds. Special envoys, bringing precious things, were dispatched with a view to securing these varieties When the first harvests were reaped in the autumn, the emperor called his closest ministers to taste them and compose poems for Champa rice and Indian green lentils."

Shu Wenying, Buddhist monk, China, eleventh century C. E.

The agricultural developments described in the passage contributed most directly to which of the following?

A. Population growth and urbanization in southern China
B. The development of new forms of coerced labor in East Asia
C. Changes in gendered forms of labor in Chinese agriculture
D. The increased export of luxury goods from China to the Indian Ocean trade network