I believe that C & D are both very good answers but the choice that i believe to be accurate is actually :
D.) I hereby declare. 
I would of said C.) , but it doesn't quite tell you what the speaker is saying or what the vibe is.
This is the answer because you can feel what the speaker is going to say and it is obvious of what the tone of voice is.
I really hope that this is helping you in some way, have a nice day :)
        
             
        
        
        
I told u the answer in the comments
        
             
        
        
        
It is important bc if you have to split ur money lets say 70 percent with 3 ppl you will have to use a fraction and you would have to divide
 
        
             
        
        
        
If you would like to see some English work the best place to see some is the library.