I’m not sure I think is C
        
             
        
        
        
I believe it is D. a new room will be automatically added to the table
 
        
             
        
        
        
"Sentence 2- The car needed a new battery, and Jack was broke" is the sentence among the following choices given in the question that contains a subordinating conjunction. The correct option among all the options that are given in the question is the third option or option "C". I hope the answer helped you.
        
                    
             
        
        
        
A. knew, because if you think about how they all sound, B and C could not work, since they sound kind of weird.  D sound like it could work, but only if it was "had <em>know</em><em>n</em>".  Therefore the only answer left to pick is "A. knew".