Urban and rural water-supply engineering typically includes which of the following integrated components?

Introduction / Context:
Water-supply systems are end-to-end solutions that start at the source and terminate at the consumer, while also meeting firefighting and public safety needs. This question checks recognition of the complete scope of a standard water-supply scheme.

Given Data / Assumptions:

• Typical municipal or institutional water-supply scheme.
• Service levels include domestic, commercial, and fire-fighting demand.

Concept / Approach:
A water-supply project normally encompasses: raw-water collection, transmission, treatment (clarification, filtration, disinfection), storage, and distribution networks (mains, sub-mains, service connections). Fire-fighting capability via hydrants is an integral design objective influencing pipe sizing, pressure zones, and storage volumes.

Step-by-Step Solution:

Verification / Alternative check:
Standard design manuals specify hydrant spacing, minimum residual pressures, and storage for fire demand—integral to the system, not an addon.

Why Other Options Are Wrong:

• Any subset omits required elements for a fully functional and code-compliant system.

Common Pitfalls:

• Underestimating fire-flow requirements when sizing mains/reservoirs.
• Ignoring water quality management from source through distribution.

Final Answer:
All of the above