You and your family have planned a weekend retreat at a lakeside campground. Upon arrival, you notice a Department of Health sign indicating the presence of fecal coliform bacteria in the lake. As an environmental science student you know toa. warn your family that fecal coliform bacteria is an indication of harmful microorganisms in the water. b. tell your family that fecal coliform bacteria is a group of harmless microorganisms, and swimming is safe. c. tell your family that the presence of fecal coliform bacteria means that swimming is safe, but the water must be purified before drinking .d. tell your family that the water is safe because fecal coliform bacteria indicates low biochemical oxygen demand. e. tell your family not to get close to the water, because fecal coliform bacteria is a leading cause of bacterial infections in the human digestive system