They gave the power to the people because they were fearful that if they had 1 leader(king, queen, or president) then the US would become much like Britain in which they had just broken free of. Hope this helps
Humanism is a big role in this. Humanism is the idea of thinking more about the individual (The things people felt and created were just as important as faith and religion)
Since philosophers were now thinking with humanism influencing them, they thought more about the individual person themselves and their role in society. Unlike earlier thinkers who thought about people as a whole and the Church's role in society. People began to come up with the ideas that the Church is not the answer to everything.
Congress could not draft soldiers or regulate trade
C) allowing free and fair elections