Which of the following is a recommended prevention measure for Cryptosporidiosis?

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Prevention revolves around avoiding ingestion of water contaminated with Cryptosporidium. Drinking water that has been properly treated is the best way to prevent cryptosporidiosis because treatment removes or inactivates the parasite's oocysts. Chlorination alone often isn’t reliable against Cryptosporidium, so treated water typically involves effective filtration and validated disinfection, or boiling water before drinking, especially when water quality is uncertain or during outbreaks.

The other options don’t fit the goal. Stopping drinking water entirely isn’t practical and would cause dehydration. Taking antibiotics daily won’t prevent a protozoan infection, and antibiotics aren’t a standard preventive measure for crypto. Avoiding sunlight has no impact on transmission.