The second choice the speaker can make is timing.
It boils down to the question: why now?
- What else is happening in this moment?
- Is this the best time to persuade this audience?
- Is it the best time for this particular goal?
Timing is important because if an audience is invested in the status quo, it is often hard to get them to change. However, certain moments in time make it easier.
For example, it is easier to get someone to feel a certain way if they've just had an experience that makes them already feel that way.
And it's easier to persuade someone to do something when a crisis creates a sense of urgency to act.