Awaking in the middle of the night may cause what?\nOptions:\n- depression\n- irritability\n- shock\n- discomfort\n- alertness Hmmm, let me think.
User
Irritability is the quality of being irritable. Irritability is generally caused by insomnia. Insomnia means inability to sleep. People with insomnia awaken in the middle of the night.
So, the answer is irritability.
Assistant