The correct answer is A.
The most important contribution the Americans took from the Romans is the idea of a representative government in which people elect officials to speak for them. It is important to have in mind that the fundamentals of democracy and the concept of individual right are also Roman heritage.
Because one is when if you do something bad then you get killed or serously hurt and the other are just laws that you have to fallow
The hoover dam was the only successful public works project
To ensure a seperation of the powers
each branch had its own powers and responsibilities.