Which of the Following Sentences Would Be the Most Effective

Multiple Choice

Which of the following sentences would be the most effective closing in a request memo?

A) I would appreciate receiving your response to this request as soon as possible.
B) Thank you in advance for your cooperation in sending a technician to install these computers by August 31.
C) If you want us to be able to serve our students effectively, I trust that you will send a technician by August 31.
D) Because the computers need to be installed before the first day of classes, please send a technician by August 31.