Final answer:
The three main components of a stairway are stringers, tread, and risers, which form the structural support, the horizontal stepping surface, and the vertical sections respectively.
Step-by-step explanation:
The three main components of a stairway are stringers, tread, and risers. Stringers are the sloped members that support the structure of the staircase, on which treads and risers are attached. The tread is the horizontal part of the stair on which you step. The riser is the vertical section between each tread. Together, these components form the structure of a stairway. This response addresses the second option (B. Stringers, tread, risers), which is the correct combination of stair components.