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.
If I'm correct, the main idea is that everyone is equal, but what do I know...
My best choice for this would be A.
A rod or spindle (either fixed or rotating) passing through the center of a wheel or group of wheels. Hope this helps! :)<span />
I believe it's A. I recall something like that happening.
Good luck and hope this helps.
