I believe it's "Laffer Curve".
Answer:The Senate was the most powerful branch of the Roman republic, and senators held the position for life. The executive branch was made up of two consuls, elected yearly. These two consuls had almost kingly powers, and each could veto, or disapprove of the other's decision.
<em /><em />Your answer is :<em>
D. </em>
Samuel Morse.
