Final answer:
China is the civilization among the given options that emphasized more separation, as it developed a uniquely sophisticated society with distinct cultural and technological advancements.
Step-by-step explanation:
Among the civilizations mentioned - Rome (a), Greece (b), Egypt (c), and China (d) - the one that emphasized more separation compared to others is China. This is evident in how China, during 200 CE, was a sophisticated society with a significant population, rich culture, and technological advancements like the printing press and the Terracotta warriors. Unlike Greek society, which was known for its close interactions with surrounding Mediterranean cultures, China developed a more isolated and distinctive civilization, marked by unique advancements in art, literature, and statecraft, including practices like Confucianism and Taoism that were almost exclusively prevalent within its boundaries.