In what circumstances is boiling water recommended as a treatment method?

Boiling water is highly recommended during boil water advisories following contamination incidents because this method is effective in killing pathogens, such as bacteria, viruses, and protozoa that may be present in the water. When a water supply is compromised, perhaps due to contamination from sewage or chemical spills, boiling is a reliable and immediate action to ensure the water is safe for drinking and cooking. The high temperature of boiling water destroys harmful microorganisms, thus reducing the risk of waterborne diseases.

While boiling may improve the taste of water or even be noted as a precaution in other contexts, the specific recommendation during boil water advisories is crucial for public health and safety. This makes it the best answer in the context of treatment methods for contaminated water. Other options may not directly address water safety in the same critical manner as option B.