Which group is most responsible for bringing social change to China during the Qing era and to Japan during the Tokugawa Shogunate?

a. Soldiers

b. Merchants

c. Nobles

d. Farmers

The group that is most responsible for bringing social change to China during the Qing era and to Japan during the Tokugawa Shogunate would be "B. Merchants," since trade led to large amounts of cultural diffusion during this time.