In the example, what is the purpose of this part “Now, today I’m going to talk to you a little bit of the difference between patching around the problem with driver assistant systems and actually having fully self-driving cars and what they can do for the world. I’m also going to talk to you a little bit about our car and allow you to see how it sees the world and how it reacts and what it does, but first I’m going to talk a little bit about the problem.”? A. Introduce the topic. B. Clarify the topic and introduce the structures . C. Explain the objective.