Answer:
A. Barriers keep companies from entering the market freely
Explanation:
<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>
Answer:
choice c
Explanation:really no explanation i just know.
