The description that matches the author's use of dialogue in this story is this: B) Lots of dialogue is used to keep the focus on the characters' opinions.
DIalogue refers to te conversations that people have among themselves in a story. Dialogues are often used to state the exact words by the speakers in a story. The main purpose of using lots of dialogue is to keep the focus on the character's opinions.
It helps the reader to see what the characters think of themselves and the subject they are discussing. It also helps the readers to form their opionions of the characters. So, option B is right.