Answer:
D). What type of font to use.
Step-by-step explanation:
As per the question, the students need to consider all of the given points except the 'type of font' before requesting letters of recommendation as it would not affect the content or efficacy of the letter.
A recommendation letter must have a formal and humble opening that would help create a positive impact. It must be written by considering 'who is the recommender' and the letter needs to be framed accordingly. Then, the information of required no. of letters for each school and about the deadline so that he/she may apply on time. Thus, option D is the correct answer.