You didn’t show the paragraph but cool
        
             
        
        
        
Explain to him/her why it’s important to work together. Many times teachers will grade based on teamwork so if he continues to be stubborn he will cost the whole group. Try explaining what your strengths are and dividing the work based on that. That way everyone can do their share to the best of their ability
        
                    
             
        
        
        
I believe the correct answer would be B., bc it is asking the reader a question, trying to get them to think further into the meaning.<span>
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They managed it despite the fact that i wasn’t there.
        
             
        
        
        
Answer:
1. could
2. should
3. can
4. could
5. might 
6. can
7. must
8. manage
9. might
10. could
11. should 
12. should
13. might
14. must / ought to
These are only suggested others are suitable for some too, I just think these make more sense.
Hope this helps :)