It was a school field trip, with four teachers and about thirty kids. Roy had purposely dropped to the rear of the line, and when the others weren't looking, he peeled away from the group. Abandoning the well-worn path, he angled back and forth up the side of a wooded ridge. He planned to cross over the top and quietly sneak down ahead of the school hikers. He thought it would be funny if they trudged into the campsite and found him napping by the creek. Hurriedly Roy made his way through a forest of towering lodgepole pines. The slope was littered with brittle dead logs and broken branches, the debris of many cold, windy winters. Roy stepped gingerly to avoid making noise, for he didn't want the hikers down below to hear him climbing. As it turned out, Roy was too quiet. He walked into a clearing and found himself facing a large grizzly bear with two cubs. It was impossible to say who was more startled. Roy had always wanted to see a grizzly in the wild, but his buddies at school told him to dream on. Maybe in Yellowstone Park, they said, but not up here. Most grownups spent their whole lives out West without ever laying eyes on one. Yet there was Roy, and a hundred feet across the glade were three serious bears - snorting, huffing, rising on their hind legs to scope him out. Why does the author choose to use this flashback in chapter 5 of the novel?
A) The flashback explains to the reader why Roy responds the way he does to the snakes. It is not his first encounter with a wild animal.
B) The flashback shows that Roy is an expert on identifying wild animals and taming them before his escape.
C) The flashback is used to show how Roy sneaks into the Running Boy's camp undiscovered.
D) The flashback provides the reader with a glimpse into Roy's future and what will happen when the snakes strike.