Which of the following helped bolster the Chinese economy during the T'ang Dynasty?
A. A free trade system was opened along the silk road allowing all Chinese citizens to conduct trade independently of government.
B. Tang leaders opened China's borders so Buddhist merchants from India could trade freely in the Chinese economy.
C. The T'ang emperors expanded their maritime trade capabilities and opened the markets of the Indian and Pacific Ocean trade system
D. Tang leaders abandoned trade along the Silk Road and began working on creating a self-sufficient internal economy.