Which of the following enabled city dwellers of the late nineteenth and early twentieth centuries to live in greater comfort and safety?

A) Indoor plumbing, central heating systems, and the adoption of public health regulations
B) The increased use of coal-burning stoves
C) Pollution control legislation
D) Government financing of low-income housing

Indoor Plumbing

A system within buildings that supplies water for purposes such as drinking, washing, heating, and the removal of human waste.

Central Heating Systems

A system that provides warmth to an entire interior of a building from one point to multiple rooms.

Public Health Regulations

These are laws and policies enacted by governmental bodies to protect and improve the health of the public, including sanitation standards, disease control measures, and health education.