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For the past six weeks, Ronald has been feeling sad, exhausted, and utterly hopeless. This morning when he woke up, however, there was a complete turnabout. Now he feels as if he has limitless energy. In the past hour, he's resolved to sign on to run a marathon, to buy an expensive sports car, to start a charity drive, and to write the leaders of the Middle East offering his services as a peacemaker. Ronald is suffering from:
What is bipolar disorder.