In a Coaching Relationship, Which of the Following Sentences Would

In a coaching relationship, which of the following sentences would be considered the best?

A) Can you think of another way of beginning your emails that might be more direct?
B) I always begin my emails in the most direct way possible.
C) You always begin your emails with chat… nobody has time for chat.
D) You should get to the point as soon as possible in your emails.
E) Don't begin your emails with irrelevant information or chat.