Early chinese rulers established by conquering and uniting kingdoms under the rule of one emperor. from 624 to the early 1100s, the ruled over a golden age of prosperity before the mongols invaded.

Early Chinese rulers established dynasties by conquering and uniting kingdoms under the rule of one emperor.

From 624 to the early 1100s, the Tang and Song dynasties ruled over a golden age of prosperity before the Mongols invaded.

Explanation:

Ever since the foundation of the Xia Dynasty in 2070 BCE, up until the overthrow of the Qing dynasty in 1912, China had been ruled a series of imperial dynasties. Early Chinese rulers established dynasties by conquering and uniting kingdoms under the rule of one emperor. Once enough territories had been conquered, it was considered that emperors had achieved the Mandate of Heaven, which means that their rule was considered legitimate, and thus had earned right to impose their own dynasty as the ruler of China.

The Tang Dynasty (618-907) and the Song Dynasty (960-1279) ruled over most of China between 624 and the early 1100s, with a brief period of strife between 907 and 979 known as the Five Dynasties and  Ten Kingdoms period. The Tang and the Song ruled over what is considered a golden age of prosperity in the history of ancient China, where social stability, economic progress, and top achievements had been reached. However, the Song was under heavy pressure from the Jin Dynasty to the north in the early 1100s. While it managed to resist the Jin, the Mongol invasion that first started in 1235 pushed back the Song further and further south, until it finally capitulated in the 1270s. The Mongol Yuan dynasty was founded on 1271, and ruled China until 1368.

ok sorry the answer is a. by their religion

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so the answer > they used radical persuasive rhetoric