Respuesta :
B. Simply because you are having to provide evidence to support your answer from a book which would set the objective of thoroughly examining
The answer is D. During the discussion there seem to be many questions and doubts which are expressed by simply asking about the theme, evidence of the book and the author's credibility. But there is a question that comes up in form of a suggestion: "what if we come back to that after...", and this is setting an objective.