The passage emphasizes the importance of clear communication between healthcare professionals and patients. It explains that when communication is poor, negative consequences such as medication errors and missed appointments can occur, ultimately affecting health outcomes. These supporting details all point to one central idea: effective communication in healthcare is essential for positive patient outcomes. Option B accurately summarizes this main idea. Option A shifts responsibility entirely to patients, which is not stated. Option C focuses on one consequence rather than the overall message. Option D is incorrect because the passage implies errors can be prevented with better communication. On the NEX exam, main-idea questions require identifying the broad message supported by multiple details rather than focusing on a single example.

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