The release of more polluting gases to our environment
 
        
                    
             
        
        
        
I think it was c but I'm not 100% sure its been years since ive read the book
        
                    
             
        
        
        
Answer:
The key concept for our discussion here is that the accelerating expansion of the universe is an innate property of spacetime itself on scales where spacetime no longer acts like traditional gravity. In summary, the influence of gravity only extends to the edge of each gravity group. Beyond that, spacetime no longer behaves like gravity.
Explanation: