Why are states called laboratories of democracy

The individual states in the United States are sometimes called "laboratories of democracy" because they can experiment with innovative policy ideas. This allows other states and the nation as a whole to see if the new ideas work or not before they adopt them.

Explanation:

1) the answer is b

senators serve a six-year term; representatives serve a two-year term, making them more responsive to (and responsible for) voter confidence.

2) the answer is d

to serve as president, one must:   -be a natural-born u.s. citizen of the united states;   be at least thirty-five years old;   be a resident in the united states for at least fourteen years.

3) the answer is a

ella,because it is constitutionally eligible

4) the answer is c: the u.s president