After Instituting Their Version of the Confucian Examinations, Koreans

After instituting their version of the Confucian examinations, Koreans:

A) Developed a social structure that mirrored that of China, but unlike in China, class tensions erupted immediately and official designations were abandoned.
B) Became influenced much less by warrior/serf feudal power structures as the responsibilities of the upper classes to see to the wellbeing of the lower classes became codified.
C) Developed four basic classes: the high-ranking scholar/gentry; the lower or minor officials; commoners, such as artisans and peasants; and then the lower group, bond slaves, laborers, and prostitutes.
D) Focused on maintaining a social structure that allocated specific responsibilities to each level, including women, who tended to become more secluded as Koreans adopted the practice of foot binding.