Which statement is true about stairs located inside a building?

• A. They are interior stairs
• B. They are exterior stairs
• C. They must be both interior and exterior
• D. Stairs are not classified by location

Answer: (A)

Stairs located inside a building are interior stairs because their location is within the building envelope and they form part of the interior means of egress. This distinction matters in code, since interior stairs are typically enclosed and require fire-resistive construction and protective features, whereas exterior stairs are outside the building and governed by different provisions. It's not necessary for stairs to be both interior and exterior, and stairs are indeed classified by location, so the other statements don’t fit.