The city where Natalia lives has poor sewage pipe infrastructure. Recently, pipes have been bursting. Which of the following BEST describes the pollutants that would have entered the city’s source water when these pipes were bursting?

a. pesticides, herbicides, and chemicals
b. bacteria, viruses, and parasites
c. phosphates, nitrates, and ammonia
d. fossil fuels, oil, and car exhaust emissions

b. bacteria, viruses, and parasites