Final answer:
Drinking black coffee and taking a cold shower will not sober up a person. Allow the liver enough time to metabolize the alcohol for sobriety.
Step-by-step explanation:
No, drinking black coffee and taking a cold shower will not sober up a person. The only effective way to sober up is to allow the liver enough time to metabolize the alcohol ingested. It takes at least five hours for a legally intoxicated person to achieve sobriety, taking into account the rate at which alcohol is metabolized and excreted from the body.