Why Did the American Colonies Become Less Dependent on Europe

Why did the American colonies become less dependent on Europe for manufactured goods during the eighteenth century?

A) Parliament encouraged such independence by placing severe restrictions on the quantity and type of European goods that could be imported.
B) Many colonies encouraged the development of colonial industries by enacting protective tariffs.
C) The American colonies were able to get such items more cheaply from Asia and Africa.
D) The increased demand for goods that accompanied the growth of the colonial population encouraged the development of colonial manufacturing enterprises.