Which of the following was a factor in leading to the growth of the factory system of the united states?
a.) the use of materials from china was cheap.
b.)the labor from other countries was abundant.
c.)the price of production
d.)the invention of modern power

The answer is: D.)The invention of modern power

The invention of modern power (such as electricity) make factories able to increase the productivity of their machines with relatively low price. Before electricity, factories have to rely on oil or coals. Both of them are more costly compared to electricity.

This make it possible for factories to increase the number of production without burning too much capital. Because of this, the invention of modern power become one of the most crucial factors that cause the growth of factory system in united states.

the united states constitution is the supreme law of the united states. the constitution, originally comprising seven articles, delineates the national frame of government. its first three articles embody the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, consisting of the bicameral congress; the executive, consisting of the president; and the judicial, consisting of the supreme court and other federal courts. articles four, five and six embody concepts of federalism, describing the rights and responsibilities of state governments, the states in relationship to the federal government, and the shared process of constitutional amendment. article seven establishes the procedure subsequently used by the thirteen states to ratify it. it is regarded as the oldest written and codified national constitution in force.