Fragments are sentences that aren't complete due to their lack of at least one independent clause. They may resemble sentences but are not when read clearly. 
For the choices above, the first choice, Sarah who works at the CD store. is considered a great example of a fragment sentence and is the correct choice. I am not sure if this is a multiple choice question or a "check all that apply" question. If you are meant to choose only one answer, then go for the first one. However, if you can check more than one, then choose I and III but not II. 
Let me know if you need further info. :)
              - Dotz
        
                    
             
        
        
        
Answer:
B
Explanation:
The Albany Plan of Union was a proposal introduced by Benjamin Franklin during the Albany Congress in 1754. Franklin's plan called for the formation of a permanent federation of colonies, as a means to reform colonial-imperial relations and to more effectively address shared colonial interests
 
        
                    
             
        
        
        
<span>C. Gideon’s position as a tribal medicine man dictates that he not betray the secret to outsiders.</span>
        
                    
             
        
        
        
Answer:
The family gives the Duvitches their fish back, and the Duvitches invite them over for food. They hang out and soon the whole neighborhood accepts them for who they are.