Answer:
First option.
Step-by-step explanation:
Fecal coliform represents a gram-negative, rod-shaped bacterium that generally grows inside the intestine or gut of warm-blooded animals. Large quantity of these bacteria in water indicates an increased risk of other viral or bacterial pathogens in water.
Some pathogens that may coincide with contamination of fecal coliform include pathogens for typhoid fever, dysentery, and viral gastroenteritis.
Thus, the correct answer is first option.