While the new Americans imitated the classical Greek and Roman republics in many ways, they did use all aspects of this classical form of government. Why did Enlightenment thinkers who formed the U. S. government decide not to include certain aspects of Greek government in their system?

The correct answer to this open question is the following.

Although you forgot to include the options for this question we can say the following.

Enlightenment thinkers, who formed the U.S. government, decide not to include certain aspects of the Greek government in their system because they did not want anyone to be able to hold an elected office for life.

The founding fathers of the United States were talented and smart people who gave everything to establish the best form of government for the country. People like Benjamin Franklin, George Washington, James Madison, or Thomas Jefferson were influenced by the brilliant European Enlightenment thinkers and philosophers like Voltaire, Jean-Jaques Rosseau, Baron de Montesquiou, and John Locke, to establish the division of powers in the federal government under the system of checks and balances, in which none of the three branches would be more powerful than the other.

the answer is "by providing data about careers and annual mean wages"