The correct answer is D) by making sure that everyone could earn a living.
Hongwu followed the teachings of Confucius by helping the economy grow and by making sure that everyone could earn a living.
We are talking about Hongwu, who was an Emperor in the Ming Dynasty. In fact, he was the founder of the Ming Dynasty. He decided to make so reformations in the government of China that centralized much of decisions on him. He believed in the teachings of Confucious and the traditional rituals he taught. He followed the Mandate of Heaven and controlled every aspect of the Empire.