Please choose the correct ending to complete the given sentence: Health: [header] How to avoid having diarrhea during travel [title] Do not drink water that hasn't been sterilized. [step] Tap water and well water aren't treated in developing nations the same way they are in developed nations. This means that diarrhea-causing microbes are often present.

Ending1: [substeps] Recommended water content is 1 to 8 cups per day. Do not drink more than the recommended amount due to dehydration. Ending2: Avoid' super' water and bottled water as well, since these are often not purified and thus will incorporate any germs and toxins you are taking in. [title] Do not take a small water pack with you. Ending3: Stick to bottled water rather than water from a tap or well whenever possible. [substeps] If you must drink water from a tap, then you should sterilize the water by boiling it for at least three minutes (five minutes if using it to mix baby formula). Ending4: [substeps] Beverages that are contaminated with microbes include alcohol, beer, coffee, and juice. Some studies suggest that drinking water should only be taken as a last resort when camping or eating out in climate-controlled areas.

Answer format: ending1/ending2/ending3/ending4