I believe that the answer is C. This is most likely the best option because it also adds a subject. B does add a better description but putting "While I" in answer C shows who is listening to the sentence
        
                    
             
        
        
        
Answer:
 Fictional stories were often based on biased ideas about Native Americans. 
Explanation:
I took the test 
 
        
             
        
        
        
It's very calming and super beautiful
        
             
        
        
        
Answer:
D
Explanation:
I hope you have a nice day!