Katia wants to add a bullet to a SmartArt shape she placed on a PowerPoint slide.Which of the following options on the Design tab should she click on to do so?

A) Include Bullet
B) Insert Bullet
C) Add Bullet
D) Select Bullet

To add a bullet to a SmartArt shape in PowerPoint, Katia should click on the "Add Bullet" option on the Design tab. This will allow her to add a new bullet point to the shape, which she can then fill with text or other content. The other options listed (Include Bullet, Insert Bullet, and Select Bullet) are not applicable to the task of adding a bullet to a SmartArt shape.