Which Statement About Choosing Attention-Getters for Persuasive Messages Is True

Which statement about choosing attention-getters for persuasive messages is true?

A) For external persuasive messages, the primary means of gaining attention is demonstrating a business need.
B) Writers have more flexibility choosing attention-getters for internal persuasive messages than for external persuasive messages.
C) Issuing a challenge is a poor attention-getter, but its use should be avoided in persuasive messages.
D) Posting a testimonial is a good attention-getter, particularly for external messages.
E) Posing a rhetorical question is an attention-getter that writers should avoid in the post-trust era.