Tests to monitor water safety often report the number of fecal coliform bacteria found in samples. Which of the following statements accurately reflects water safety recommendations based upon fecal coliform levels?
a. If the level of fecal coliform bacteria is low, then the water was probably contaminated by sewage.
b. aif the level of fecal coliform bacteria is low, then the water may still be unsafe because of the presence of other pathogens
c. if the level of fecal coliform bacteria is high, then the water is safe for drinking and recreational purposes
d. if the level of fecal coliform bacteria is high, then the water is safe for drinking and recreational purposes