Read the sentence.

you have to agree that paving over that muddy, gross area where we wait before school is a good idea.

which revision makes the tone of the sentence appropriate for a formal e-mail?

a. review our suggestion for paving over the muddy area where students wait before school.
b. you know, you should consider paving over the area where we wait before school because it’s gross.
c. note our awesome suggestion for paving over the gross area where we wait before school.
d. paving over that muddy area where students wait before school is obviously a smart plan.