48. You are studying the bacteria in the water of a nearby pond. From a 100 mL sample, you use a 0.5 mL subsample to inoculate a plastic dish filled with a semisolid nutrient medium that fosters growth of coliform bacteria. After an appropriate incubation period, you count 100 bacterial colonies growing on the surface of the medium. What conclusion can you make about the coliform bacteria in the pond water? (A) There is approximately one coliform bacterial cell per milliliter. (B) There are approximately 200 coliform bacterial cells per milliliter. (C) There is approximately one coliform bacterial species per milliliter. (D) There are approximately 200 coliform bacterial species per milliliter.