C. other planters because  there population was big during those time
 
        
                    
             
        
        
        
Answer:
Option: Abundant resources
 Free land.  
Explanation:  
Oregon attracted settlers because of abundant land, fertile soil, and mild climate. The rich fertile lands of Oregon brought thousands of pioneers. People from Missouri, Indiana, and Illinois found the rich farmland in areas like the Willamette valley persuasive. Trappers also attracted because of the abundant fur-bearing animals. The land was free to those who could make it the Oregon Territory. People began to assemble their belonging and took the trail in wagons pulled by oxen.
 
        
             
        
        
        
One would be the Great Wall of China, and another would be the Ming Tombs.