Aweakness of the articles of confederation was its failure to
a. establish a national legislature.
b. require unanimous consent to pass amendments.
c. allow each state one vote in congress. d. create a mechanism to enforce state cooperation.

The correct answer is D) Create a mechanism to enforce state cooperation.

The Articles of Confederation was America's first constitution as a new independent nation. This constitution was extremely ineffective, as it had a weak federal government that had no legitimate power over state governments. For example, when raising a national army, states had the option on whether or not they would send soldiers for the cause. This lack of control over the states resulted in disunity and disorganization. Ultimately, this constitution would be replaced by the US Constitution.

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.