B because the word very is showing how well he is smart and helping to explain.
When a story is written in third person point of view, it may cut off some of the personal feelings you might get if you were reading the story in first person, or even second person point of view. The thing is, first person is a lot more personal than third person. Third person is kind of like just telling you the story. (Although it is not narrative)
Because kids and adults have different thoughts the get way more emotions