What were the physical obstacles, political issues, and economic factors involved in building a network of roads, canals, and railroads in the northeast?

Physical obstacles:

Rivers were hard to find, so canals had to be built.

The mountains were hard to cross, so railroads had to be built.

Economic Factors:

The need for cheap ways to deliver goods far away pushed the creation of roads, canals, and railroads such as the National Road. These endeavors costed money.

Political Issues:

President Monroe deemed unconstitutional and vetoed a bill that would have granted money for the states to build roads.

John C. Calhoun and Henry Clay defended the need for new roads and other methods of transportation.

answer; i believe the answer is (mesopotamia); modern day