Correct answer choice is :
The U.S. Constitution set America's national government and significant laws and guaranteed secure basic rights for its citizens. It was approved on September 17, 1787, by members to the Constitutional Convention in Philadelphia, led over by George Washington. To make it simple the U.S. Constitution lays out the fundamental structure of the state. Republicanism is a state ideology focused on citizenship in a state founded as a republic under which the people hold democratic sovereignty. Many countries are republics in the mind that they are not powers.