Why is the answer A and not B?

Why is A correct? Why is B incorrect?

@Steph and @Shiyi-Zhang, Great question. The question asks, "Which one of the following best describes the organization of the passage?" In order to answer this question correctly, we need to make sure we have a solid understanding of the passage as a whole and how each part of the passage plays into the entire passage. The first paragraph gives us Pocock's approach. The second paragraph gives us an example of one of his investigations. The third paragraph gives us another example of one of Pocock's investigations and then wraps up by saying that Pocock's method is a good one even if it's not perfect. (A) says a description of a thesis is offered, specific cases are considered, and an evaluation is given. This is a great fit with what we anticipated the answer to contain, and it's our correct answer. Both of you had trouble differentiating between (A) and (B), so let's take a look at (B) to see why it's wrong. (B) says a thesis is brought forward, the thesis is qualified, and evidence that calls the qualification into question is stated. The first two parts of this answer choice are great. However, there is quite a bit that happens before the thesis is qualified (namely, the examples being given), and the author never calls into question her qualification of the thesis. In order for (B) to have been correct, the author would have had to make the qualification of Pocock's thesis and then turn around and call into question the qualification she had just made. Not only would this not make sense for her to do, but it's also not at all what the author does in the passage. Does this help you better see the distinction between (A) and (B)? If you have any more questions, let us know!