Kuwon sometimes struggles to contain her happiness and ends up doing cartwheels in the halls at school. Other times, she wants to stay in bed because she feels so sad. She is irritated easily when she is sad, and she cannot sleep when she is happy. What disorder does Kuwon most likely have?

Kuwon has periods of unusually elevated mood and energy, shown by doing cartwheels and being unable to sleep, as well as periods of intense sadness and irritability. Alternating episodes of elevated and depressed mood are characteristic of bipolar disorder, so the best answer is A, bipolar disorder.

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