a noun
jack and milly came to tea
jack is he,milly she and little susie? well that's me
 
        
                    
             
        
        
        
Explanation:
by being kind to her and behaving nice
 
        
             
        
        
        
The sentence which uses correct punctuation is C. In time, of course, all issues get resolved, but not necessarily in the way you would like.
In A, the comma before <em>he was concerned </em>should be a dash. In B, there should be a colon before <em>a flashlight, </em>not a semi colon. In D, there should be a comma before <em>yet, </em>and not a colon.