Which construction type is less prone to collapse?

• A. Type II
• B. Type V
• C. Type I
• D. Type III

Answer: (C)

The main idea is how fire resistance of the structural system influences collapse risk. Type I construction uses fire-resistive materials and protective assemblies for the structural elements, meaning columns, beams, and floors are designed to resist heat for longer periods. That slows heat transfer to critical members, helping them retain strength during a fire and delaying or reducing the chance of collapse. The other types rely more on combustible components or have less protection for the structure, so they tend to weaken faster under fire exposure. So, among the options, Type I is the least prone to collapse.