The clean water would not regulate which of the following
a A tanker that had collided with an icerberg leaks petroleum into the sea
b= several people are infected with E coli after swimming in a lake
C= a pond sorrounded by crop field experience eutrophication
D= A drought that causes water in a residential well to become increasingly turbid
E= Effluent from a factory increases a river arsenic content to 0.0015mg/l
