Answer:
?what are you asking or saying?
Explanation:
 
        
                    
             
        
        
        
If you accept either C or D as the correct revision then you have to accept both of them. Hence the best way to treat the sentence is to ignore both of them.
B is not correct either. You can over punctuate. 
That leaves A. 
Sometimes the right answer to many things is to do nothing. My dad used to say "Don't fix what isn't broke." 
A is the answer <<<<<
 
        
                    
             
        
        
        
D, because the other three are very wide topics but you can explicitly discuss the effects and cause of MLK's bus boycott <span />
        
                    
             
        
        
        
It's called a chapter. And they make your book.
        
             
        
        
        
I believe it’s the Last option. I searched it up for a background check and this is what I found :)