13. The two small dogs faced each other on the sidewalk outside the store. Their teeth were bared. The fur on their backs stood straight up, and low growls could be heard from each of them. Just then, the store owner brought out a dog bone for each and tails began to wag. What is the central idea in this passage? A. Small dogs tend to get into fights. B. Hungry dogs wag their tails for bones. C. Angry dogs can be distracted by food. D. Many dogs do not get along well.