Trade increased during the han dynasty because of

Explanation:

The economy during the Han dynasty was defined by population growth, growth of industries as well as trade and nationalization. New inventions and the bloom of art also contributed to the increase in trading during that period.

d) a constitutional amendment

the answer to your question is a because laws act as guidelines as to what is accepted in society. without it there would be conflicts between social groups and communities. it serves as a norm of conduct for citizens.