In the 1800 many people living in cities in the US died of infectious diseases such as Cholera which is caused by a bacterium found in the feces of a infected person that pollutes water due to lack of water sanitation. Cholera is no longer a major problem in the US but is still a problem in many countries around the world .What is the most likely reason for the elimination of cholera as a major disease in the US A) sewage treatment plants have eliminated such pathogens from drinking water
B) ppl have learned the importance of washing their hands
C) Advances in medicine have led to cures for cholera
D) Regulations have prevented factories from dumping pollution into lakes and rivers