Answer:
4. claimed to be both Roman emperor and pope
Explanation:
The term designates a political system seen in the Eastern Roman Empire. The Byzantine emperor was both the head of the state and head of the Church. He was the supreme authority in religious affairs. Nevertheless, the concept of  caesaropapism is largely inaccurate; many current scholars estimate that nothing in the Byzantine Orthodox doctrine states that the emperor was infallible (like the Roman pope, according to Catholic dogma).
 
        
             
        
        
        
Prince Henry<span> (Henrique) the Navigator (1394-1460) was a Portuguese royal </span>prince<span>, soldier, and patron of explorers. </span>Henry<span> sent many sailing expeditions down Africa's west coast, but did not go on them himself. ... The flag of Portugal during </span>Prince Henry's<span> life.</span>
        
             
        
        
        
B is the most accurate for this question! :D
        
             
        
        
        
In the United States of America, the highest law (power) is contained in the constitution of this country.  The constitution that was created after the declaration of independence of the 'new world' not only tied the American people and the nation in one thread, but also set a model before the world. 
The US Constitution is the first written constitution in the world to include aspects such as the nature of the state, the principle of the separation of powers of citizens, and judicial review.
Following are the features of U.S constitution;  
1.	First written constitution
2.	Irreversible Constitution
3.	Federal constitution
4.	Presidential government  
Importance of US constitution;
The formation of the American Constitution gave the world with a basis for written and democratic government. Many countries of the world adopted the U.S constitution as a base to make their constitution. This is the most prominent source of written legislation empowering citizens. 
The principle of separation of power is important in the constitution. The Constitution of America has an important contribution in making the world the major power.