Ok it would  be C. (Park's) because when you put 's at the end of a word it means it belongs to something and in this sentence the gates belong to the park. 
        
             
        
        
        
In the binary (good vs. evil) epic world of Beowulf, the king is a defender of law and order, and Grendel is the villain who challenges these principles. But neither the king nor Grendel act on their own. The king is God's representative on Earth and a protector of all his subjects. On the other hand, Grendel is not an ordinary villain or a monster. He is the descendant of Cain, Biblical figure who killed his own brother. As a creature of hell, he mustn't touch the king's throne, which is God's endowment. In other words, the one who symbolizes the Devil must stay away from God's symbols.
        
             
        
        
        
Corporations kidnapped the democratic process, imposing colonization of the Western United States, Hawaii, The Philippines and the economic colonization of Cuba, ushering in the Gilded Age of the Robber Barons. 
Three Points: 
Western Expansion of the US. The Railroad Corporations.
The Takeover of the Kingdom of Hawaii.
The Spanish-American war and the robber barons of the Gilded Age.
lal of these are historically accurate and you have a lot of research and writing to do but the foundations of your work are solid.