Suppose That a Writer Wants a Response from the Reader

Multiple Choice

Suppose that a writer wants a response from the reader the same day. Which of the following closing statements will be most effective in building goodwill in this case?

A) Thank you! Your reply will be appreciated.
B) If you need further information, please don't hesitate to ask me.
C) Please contact me as soon as possible.
D) Please send me these details at your convenience.
E) Your reply by the end of the day will be appreciated.