This question examines the understanding of what brain researchers say about creating new pathways in the brain. The correct answer is B, as the passage mentions that new habits are consciously developed, which implies the creation of new pathways. Option A is incorrect because it suggests ignoring old habits, which is not mentioned as a necessary step. Option C is wrong because relying solely on old pathways would not lead to the creation of new ones. Option D is incorrect because it contradicts the idea that conscious effort is needed to develop new habits and pathways.