The correct answer is D. Senator McKee, I am writing to humbly request your presence at our Harper Middle School Honors Brunch, the annual event where we celebrate our students and eat some delicious food. I know how busy you are, but if you could find the time to attend, everyone would be grateful.
Step-by-step explanation:
In writing, an academical style refers to a type of writing that is mainly formal and impersonal, this means elements such as contractions, words that express feelings or judgments, slangs or colloquial words are avoided and instead grammar is followed and formal words are included. In the case of the original sentence, the use of language in "rockin' breakfast sandwiches" "you're crazy busy", "spare" and "we'd all be super excited" are too informal, also they include colloquialism and contractions that are not suitable.
This means, to revise this sentence it is required to replace those words by more formal ones and omit contractions. According to this, the most appropriate revision would be option D. as in this case the term "some delicious food", "how busy you are", "attend" and "everyone would be grateful" have been used to replace the informal section and all of them use formal language, do not include contractions and follow grammar and therefore fit with the academical tone.