What is the best way to: to stay hydrated during your flight

Available options: A. Alcohol inebriates you and makes it harder to get REM sleep, so while it might calm the nerves short term, it's going to make you that much more exhausted and groggy when you arrive. B. Alcohol dehydrates you and makes it harder to get REM sleep, so while it might calm the nerves short term, it's going to make you that much more exhausted and groggy when you arrive.
Answer:
B.