Which of These Concluding Sentences Is Most Likely to Build

Multiple Choice

Which of these concluding sentences is most likely to build goodwill in a routine inquiry message?

A) Thank you in advance for your help.
B) Hoping to hear from you at your earliest convenience
C) As we must begin production on February 1st, I'll appreciate your response by that date.
D) Thank you for your cooperation.
E) Your early response would be most sincerely appreciated.