Which most accurately reflects occurrences during the Qin dynasty?
1 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.
2 Genghis Khan conquered China, began building the Silk Road to connect China and India, and developed the first Chinese written language.
3 Kublai Khan expanded the Mongolian Empire, he met with Marco Polo and traded information and goods, and the bubonic plaque killed 60 percent of the population.
4 Emperor Gaozu reduced taxes on the common people, made Confucianism an integral part of the Chinese culture, and instituted a meritocracy form of government.