Use reasoning to lead to the answer of the following question:
What may you have after awaking after a night of heavy drinking?\nOptions:\n- get up\n- discomfort\n- discomfort\n- headache\n- shock
 Reasoning process:
User
Headache is a severe pain in the head. Heavy drinking causes hangover. Hangover causes headache. Therefore, the final answer is headache.
Assistant