D) I am so terribly sorry., would be the most formal.
I think controversial, because things can look fake but sometimes they can look real. i don’t know though.
The correct answer is Harmonizer.
Why?
You have every person in the group (Apeers to be a music band), but you have no one to prudce it. This is why harmonizer is the correct answer.
Hope this helps!
There is no excuse for bad manners is part of english speech.
