Which statement correctly describes the relationship between standpipes and attack lines?

• A. Standpipes are portable hoses connected to a water supply; attack lines are fixed building water distribution systems.
• B. Standpipes are used outdoors; attack lines are used indoors only.
• C. Standpipes are fixed building water distribution systems; attack lines are portable hoses connected to a water supply.
• D. Standpipes are used for ventilation; attack lines are for lighting.

Answer: (C)

Standpipes are fixed building water distribution systems, providing outlets throughout a structure for firefighters to connect hoses to water supply. Attack lines are portable hoses that firefighters carry and deploy to apply water to the fire, and they can be connected to a standpipe outlet or to a water source like a hydrant. The statement is correct because it clearly distinguishes the building-fixed infrastructure (standpipe) from the portable hose used by firefighters (attack line).