Respuesta :
"Please review our suggestion for paving over the muddy area where students wait before school" is the one revision among the following choices given in the question that makes the tone of the sentence appropriate for a formal e-mail. The correct option among all the options that are given in the question is option "A".
A)Please review our suggestion for paving over the muddy area where students wait before school.
Option A has the correct revision for a formal email. It states the topic without using any informal tone or voice. Option B is informal because of the introductory phrase "you now" and the vagueness of the observation "it's gross." Option C is informal due to the words "awesome" and "gross". Option D is informal because of the use of the word "obviously" and "smart".