What makes the man decide to run long distances?

Listen to the conversation, and mark each question as A, B, C or D according to your listening.
Interviewer: So what propels you to be able to do some of these things, running the distances? You know a lot of people wouldn’t even dream of it.
Scott Jurek: I think for me it’s that self-exploration, the idea of there’s something out there and the desire to see what my body, what my mind and down to what my spirit can do.
Interviewer: Were you always a runner? I mean, how did this start?
Scott Jurek: For me, I actually used to hate running. I grew up hunting and fishing in northern Minnesota, and that was where I got connected with the outdoors. And I had got interested in running through Nordic ski racing and I had to get ready for the...basically, the snow season by doing some running on the ski trails.
Interviewer: You obviously do this competitively. What’s the furthest distance you’ve ever run?
Scott Jurek: The furthest distance I’ve run is 165. 7 miles in 24 hours.
Interviewer: So tell me how that works. Are you taking breaks or what are you doing?
Scott Jurek: So the more time I take breaks...the clock is always going, so the idea is to continue running throughout and as much as you can, because you only get 24 hours. And the only times I did stop were to go to the bathroom, basically, and even eating is done on the run.
Interviewer: Have you heard about the medical aspects of this? What have you been told?
Scott Jurek: Well, I think it helps...I’m actually a physical therapist and so I know a little bit about the body. But you know is it healthy to go that far in that amount of time? You know, it’s hard to say, but the human body was built for endurance. If you look at our ancestors and what they did...I mean, even think of my great grandparents and what they did for work out in the fields, and I think maybe our perception of what is normal has changed over the years. And I like to always refer to what people used to do.
Interviewer: You talk about exploration and maybe to some extent exploring what the body can do, but at some point, you made the decision to say, "I’m gonna go from someone who didn’t like to run to racing in the hardest, presumably, running competitions in the world. " Was there a moment when that happened for you and you said, "I can actually do this" ?
Scott Jurek: I think it was probably after my first 50-miler, after my first ultra-marathon. I’d run a marathon and then a month later decided to do this 50-mile race. A buddy of mine, Dusty Olson, said "you’ve got to try this out. "