(A) because the primary purpose of a thesis statement is to present the essay's topic to the reader, introduce the audience to your position on the subject and provide a guide for the arguments you intend to make to support this belief or idea
B because the narrator might see it as what he believes in so he could be putting his opinion into it not letting the character in the book believe anything else
Definitely bandwagon, loaded words and all the others. I would also say testimonial
