Coliforms are used as indicator bacteria in disinfection verification because which statement is true?

Coliforms are used as indicator bacteria in disinfection verification because which statement is true?

• A. They are easier to detect and harder to destroy than most pathogenic organisms.
• B. They are the most harmful organisms in water.
• C. They occur only in wastewater.
• D. They require specialized testing to detect.

Answer: (A)