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.
"Sumerian city-states fought each other" would be the best option from the list, since this internal division led to a collapse of power that left people without protection or a solid economy.
