An important Roman contribution to American government is the idea of a "republic" or the creation of a representative democracy. In the Roman Republic, representatives were elected by the people to govern on their behalf in the Senate, similar principles were used in structuring the American system of government.
        
             
        
        
        
The answer is B im pretty sure sorry if its wrong
        
                    
             
        
        
        
The correct answer is d. Medical technology was used to treat malaria. Malaria was rampant in the tropical regions and the Europeans conquering these regions had challenges combating the disease.  The colonists and locals had a form of treatment before identifying the cause of the disease. The isolated and used quinine to treat the illness. 
        
                    
             
        
        
        
The Bank's existence is a great example of implied powers: the Constitution doesn't say that Congress has the right to establish a bank, but its defenders claimed that one was necessary to carry out the Congress' power to collect taxes.