You have gained your audience's attention, introduced your speech topic, previewed your main points, and given your audience a reason to listen to your speech. Next you transition into your first point

What have you left out of this speech introduction?
a. Nothing; you have included all of the necessary elements of an effective introduction.
b. You have overlooked the preview statement.
c. You have not established your credibility
d. You have not included your specific purpose.

c