C is a given statistic, and a pertinent point. Out of all the answers I feel as if it's the strongest.
D and E are also answers that add value to the role of the self-driving car.
A and B don't claim anything about the value of a self-driving car and are just observations.
According to Nancy Duarte's TedX Talk, every presentation should end with a call to action. The world must be described as a new bliss by showing the audience why they should adopt or accept your ideas. It is important because the presentation will be effective, impactful and well-remembered if it was ended in a poetic and dramatic way.
I’m pretty sure the answer is balding hair.
