One of them said they were not from around there and had no idea . We could identify with that . I decided to turn back and try and head in the direction of the highway because I knew it went back to Ambleside . By this time , the sun had disappeared behind the mountain and I was starting to have visions of bedding down under some rock for the night while our eighteen college students wondered what in the world could have become of us .

Question: Why is the narrator looking for a rock ?
Answer: None of the above choices .They need to crush it up .They need to hide from the students .They need cover .