Which reason most closely illustrates why the national government was unable to maintain law and order under the articles of confederation?
there was no national court system.
state approval was needed to pass laws.
the nation had two systems of currency.
the government was unable to regulate trade.

Among the options given on the question, the answer is option A.

There was no national court system.

Explanation: The Article of confederation was the first constitution of United states of America. It lasted from 1776 to 1789. The article established a week national government and gave more power to the states. The states were more like sovereign and independent,whereas the national government was only to represent the nation during the war and international summit.

However under this system,the national government was unable to maintain the law and order centrally. Because there was no federal court. The national government had power to pass laws, but they did not have the ability to enforce the law. The states could ignore the law if they did not support it. The result having no national court system made the government unable to order the state for enforcing any law. So the national government was unable to maintain the law and order under the  Articles of Confederation.

answer; i believe the correct answer is (a) the correlation between the cause variable and outcome variable is zero;