How did the city solve the problem of sanitation?

• A. Sanitation department
• B. Water filtration systems
• C. Sewers
• D. Public Water

Answer: (C)

Solving sanitation in a growing city hinges on removing waste from living areas. Sewer networks provide the infrastructure to transport wastewater from homes and streets to treatment facilities or safe disposal sites, whichcuts down on filth and protects public health. This physical system is what actually fixes the sanitation problem, not just having an agency or a method that cleans drinking water.

Administrative bodies like a sanitation department oversee and manage sanitation efforts, but they don’t by themselves remove waste. Water filtration improves the cleanliness of drinking water, but it doesn’t address the removal of sewage. Public water refers to supplying clean water, not disposing of wastewater. The sewer system uniquely solves the core issue of moving waste away safely, which is why it’s the best answer.