I think it is B. Dido
I dont think im 100% right but I think it should be that please forgive me if I'm wrong :(
<span>The central idea in this passage is positive reinforcement. The store owner encourages the dogs into being less aggressive and behaving better by giving them the reward of a bone if they stop. This is called positive reinforcement because it gives them a positive reward which reinforces the idea that they should behave in a certain way.</span>
