Which most accurately reflects occurrences during the Qin dynasty?

A. Genghis Khan conquered China, began building the Silk Road to connect China and India, and developed the first Chinese written language.
B. Emperor Gaozu reduced taxes on the common people, made Confucianism an integral part of the Chinese culture, and instituted a meritocracy form of government.
C. Kublai Khan expanded the Mongolian Empire, met with Marco Polo and traded information and goods, and the bubonic plaque killed 60 percent of the population.
D. Emperor Qin Shi Huang unified China, began building the Great Wall of China, and left behind a grave filled with thousands of life-size terracotta warriors.
I guessed A...?