Final answer:
Under the Han dynasty, iron and salt were made a state monopoly to control their production and distribution.
Step-by-step explanation:
Under the Han dynasty in China, iron and salt were considered to be of great importance. In order to control and regulate their production and distribution, the government made these goods a state monopoly. This meant that only the government had the authority to produce and trade them. By doing so, the Han dynasty aimed to maintain control over these essential resources and ensure their availability to the people.
Learn more about Trade regulations in ancient China