What tribe formed a confederation that may have inspired the US Constitution

In 1988, the U.S. Senate paid tribute with a resolution3 that said, "The confederation of the original 13 colonies into one republic was influenced by the political system developed by the Iroquois Confederacy, as were many of the democratic principles which were incorporated into the constitution itself."

Explanation:

answer; researchers typically cannot control people's sexual behaviors as would be necessary in an experiment;

in what process is there a multiple choice answer?