What did the US Constitution accomplish? It instituted a working taxation system. It established a strong economic structure. It enabled free trade agreements with Britain. It created a stronger national government.

The US Constitution created a stronger national government.

Explanation:

The Constitution of the United States of America is the primary source of law in the country's legal system. What is included in the constitution is the basis for the operation of the federal government, defining the relationship between the government, individual member states, and citizens. The text was adopted in Philadelphia on September 17, 1787, and was ratified in all states in the following years. It has been modified twenty-seven times; the first ten constitutional amendments are known as the Bill of Rights. It consists of a preamble, seven articles and the aforementioned twenty-seven constitutional amendments.

This document is the oldest constitution in history and is still in force today (not counting the state constitution of Massachussets, adopted in 1780 and still in force today).

A strong economic structure.