Final answer:
The leaders of the Tang Dynasty chose to keep the Chinese capital Ch’ang-an for its geographical advantages, including its strategic location and access to trade routes, which supported political stability and economic prosperity.
Step-by-step explanation:
The main reason that the leaders of the Tang Dynasty chose to keep the Chinese capital Ch’ang-an as they developed their imperial state was geographical advantages. The leaders of the Tang Dynasty chose to keep the Chinese capital Ch’ang-an for its geographical advantages, including its strategic location and access to trade routes, which supported political stability and economic prosperity.
Ch’ang-an was strategically located in the center of China, making it easier for the government to communicate and control the vast empire. It was also situated along important trade routes, allowing for economic prosperity. Additionally, by keeping the capital in Ch’ang-an, the Tang Dynasty could maintain political stability by centralizing power and administration.