Using cheap sources of labor to provide raw materials that can be made into finished goods is an example of which concept?

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

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