Answer:
fears that Congress might seize too many powers under the necessary and proper clause; concerns that republican government could not work in a land the size of the United States; and their most successful argument against the adoption of the Constitution — the lack of a bill of rights to protect individual liberties.
Railroads made transportation of materials, supplies, etc much faster and easier.
Canals (such as the panama canal) helped make water transportation easier and quicker.
Roads made everyday travel easier
