The answer is Number 3, Amos.
Geography played a critical role in the economic development of New York, Boston, and Charleston, since all of these cities were located on the Atlantic Ocean and had protected harbors, that allowed for unprecedented levels of trade with both other states and other nations.
Eli Whitney inventing the cotton gin which separated cotton seeds from their fiber and also increased the cotton supply in the south. Another event is the first national road to link parts of the country together to transport and increase trade throughout the United States.
<em />I think it is a representative government.
<span>Carpetbaggers were Northerners who went south to participate in Reconstruction.</span>