When you're writing a persuasive message,you can encourage a positive response by

A) using polite and positive language.
B) taking steps to establish your credibility.
C) understanding and respecting cultural differences.
D) all of the above.

Using polite and positive language, establishing your credibility, and understanding and respecting cultural differences are all important factors in effectively persuading your audience and encouraging a positive response. By employing all of these strategies together, you create a message that is more likely to be well-received and acted upon.