What was one government reform enacted by the tang dynasty?

One government reform enacted in the Chinese Tang dynasty was its emphasis on education. It was one of the reforms that contributed the dynasty’s success. The Tang rulers did not feel that a well-educated people is a threat to the government. For the rulers, an educated public is a foundation of a stable and prosperous society. Unlike other forms of government who feared intellectuals, the Tang dynasty embraced knowledge and education, thus, encouraging its people to have a form of education.

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The answer is d.  the north had organized schools, whereas the south had few organized schools.