Question

Which is an example of hypothetical evidence?

Answer 1

The answer on E2020 is

D. Imagine how politics would change if leaders wrote their own speeches.

(I just took the Quiz)

Answer 2

Hypothetical evidence is based on speculation rather than on concrete facts. This is similar to a hypothesis in science. 

The closest one I can see is answer D. The writer is asking you to imagine what would happen if leaders wrote their own speeches, instead of telling you what does and is known to happen when they do write their own speeches. (I hope that wasn't too confusing.)