During a prefire walkthrough of a commercial building in the city, the crew from Truck 2 observes that the building is constructed with concrete and steel structures, stairways are enclosed in concrete, and stairs are located at two ends and the center of each floor. These are characteristics most closely associated with which of the following building construction types?
A.Type II: Noncombustible.
B.Type I: Fire-Resistive.
C.Type IV: Heavy Timber.
D.Type III: Ordinary Construction.