Which development primarily aided the growth in labor supply for porcelain production in China?

The development of champa rice played a significant role in increasing agricultural yields, which, in turn, contributed to a growth in the labor supply for porcelain production in China. Champa rice, which was introduced from Vietnam, is a fast-maturing variety that allowed for multiple harvests within a single year. This agricultural innovation led to a surplus in food production, which supported a larger population.

As food became more abundant and accessible, a greater number of people were able to sustain themselves and their families, leading to population growth. This increase in population created a larger labor force available for various industries, including porcelain production. With more workers available, the production of porcelain could expand, utilizing the increased agricultural capacity to support these laborers.

The other options do not directly link to the growth of labor supply for porcelain production. The introduction of the printing press, for example, primarily affected the dissemination of knowledge rather than labor supply. Similarly, while expansion of trade routes is important for economic growth and could indirectly affect labor supply through demand for goods, it does not specifically address the agricultural improvements that were crucial in this context. Cultural exchanges may enhance the understanding and techniques related to porcelain production but do not contribute directly to labor supply. Thus, the cultivation of champa