Answer: D. Appeal to the commonplace concerns of your audience
Step-by-step explanation:
For the audience to be attracted to your speech they need to relate to your speech .
One can ensure this by researching more about their audience's attitude, views and feeling towards the subject that they will be talking about in their speech.
If one doesn't do this background check or research on their audience they are likely to present ideas that are of their own and the speech becomes self centered.
One should be able to deliver a speech that is audience centered meaning they must relate to it for them to be interested to listen .