a. Created national political institutions
b. Made possible a national economic market by giving Congress the power over tariffs, interstate commerce, and coining money, among others
c. Reduced the powers of the states

The Constitution was created because the previous constitution, the Articles of Confederation, had created a very weak federal government. This was rectified by the Constitution which:

Created Congress - Congress is a national political institution that is in charge of making laws of the United States amongst other things.

Created a national economic market - Congress got powers over important economic decisions such as interstate commerce and printing currency.

Reduced state powers - State law was placed under federal law to ensure that the federal government could better take care of all Americans.

In conclusion, the Constitution contributed to the unity of the United States by creating Congress, giving Congress wide powers and curtailing the powers of the states.

Find out more at brainly.com/question/24923999.

Options for this question include:

a. created national political institutions

b. made possible a national economic market by giving Congress the power over tariffs, interstate commerce, and coining money, among others

c. reduced the powers of the states

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3 years ago