Answer: the awnser would be C Pompeii was this old awsome city near Naples in Italy, built at the foot of a weird mountain.
Explanation: BECAUSE, you have to think about what the fourth graders would be interested in, sure maybe some would be interested in the others. But what would get them into it the most. "weird mountain" would definitely. They would probably wonder why and want to hear more so they could find out why the mountain is weird. That's what I think