Answer:
The way that differs modern U.S. from Ancient Greece is
D. The United States is a representative democracy.
Step-by-step explanation:
To understand this answer we need to analyze representative democracy and the rest of the options. Representative democracy is the type of government that deposits the decision making of the government into the representatives of the people. The U.S. has the senate and the congress and their members are chosen by people. In ancient Greece, this didn't happen. Also, they participated in the army and even though some military duties need to be carried on by the civilians. Not all of them are active members of the army. Women can vote in the U.S. and in ancient Greece they couldn't. Also, the U.S. Government is divided into different bodies.