Hello there, the correct answer is:
3. Ease of admittance.
In the USA is is the law. Medical issues are private matters between a healthcare provider and patient. If a person's private information was to "get out" it might affect their ability to get a job or they might face other predjudices Also the private insurance numbers could be used to steal someone's identity.
The Institute of Medicine recommends 13 (3 liters) cups of water (and other beverages) each day for men and 9 (2.2 liters) cups of water (and other beverages) each day for women.