The sentence that uses abbreviations and numbers correctly is D. The controversy here is related to the number. Whether to use numerals or to spell out numbers as words is a matter of style. However, most of the punctuation guides agree that you should use words for the numbers one to nine, but for larger numbers the rules vary widely. In the case of the APA style, it generally uses words for numbers below 10 and numerals for numbers 10 and above. That's why I would say that D is the correct answer.
