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 :)
The target for an audience for an open letter is a specific individual! For more information go to: https://en.wikipedia.org/wiki/Open_letter
The best way to prevent tooth decay in children is to: C. Use natural sugars such as maple syrup, rather than refined sugars. Hope that helps.