The three characteristics that apply to an effective opening statement are:
- Logical - An effective opening statement should present a clear and coherent argument that makes sense to the audience.
- Includes a call to action - A compelling opening statement often encourages the audience to take a specific action or consider a particular viewpoint.
- Debatable - An effective opening statement typically presents a viewpoint or argument that can be discussed and challenged, allowing for engagement with the audience.
So, the correct answers would be: logical, includes a call to action, and debatable.