When traveling to a region with uncertain water safety, which recommendation best reduces risk from water and ice?

• A. Rely on local tap water because long-term residents have adapted to it and the microbes present will not affect short-term visitors, making bottled water unnecessary.
• B. Use untreated river water for drinking and ice production because natural sources are always preferable to municipal systems when traveling in rural areas.
• C. Drink bottled water with an intact seal, avoid ice in drinks unless you know it was made from safe water, and use bottled or boiled water for brushing teeth.
• D. Only consume alcoholic beverages because alcohol content neutralizes all waterborne pathogens and ice safety is irrelevant when alcohol is present.

Answer: (C)