What contributed to improvements in the Great Lakes' water quality? 

A)  banning phosphate detergents 
B)  banning the dumping of old cars 
C)  banning nitrate detergents 
D)  banning the dumping of household cleaners

Phosphate Detergents

Synthetic cleaning products that contain phosphate compounds, which can cause environmental issues when they enter water bodies.

Water Quality

The condition of water, including its chemical, physical, and biological characteristics, as related to its suitability for a specific purpose.

Dumping Household

The improper disposal of household waste, including electronics, chemicals, and everyday garbage, posing environmental and health risks.