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.
Answer:
noun: the substance or essence of a speech or text.
example: i got the gist of what the teacher was saying.
it basically just means the meaning behind the words
hope it helps
