What happened to change the water quality in Flint?
The city added chlorine to the water supply, which removed harmful bacteria.
The city switched its water source from the Flint River to the Detroit water system.
The city built a new pipeline to connect to a nearby water system.
The city switched its water sources from the Detroit water system to the Flint River.
The city switched its water sources from the Detroit water system to the Flint River. This led to an increase in lead levels in the water supply due to insufficient treatment and corrosion of lead pipes.
The city switched its water source from the Flint River to the Detroit water system.
The answer to the question "What happened to change the water quality in Flint?" is:
The city switched its water source from the Detroit water system to the Flint River.
To get the answer, I analyzed the options given and determined that the most accurate choice regarding the change in water quality in Flint is the one where the city switched its water source from the Detroit water system to the Flint River. This change in water source ultimately caused the water quality issues that affected the residents of Flint.