Which statement correctly identifies common culvert types and a primary sizing consideration?

Which statement correctly identifies common culvert types and a primary sizing consideration?

• A. Pipe culverts (circular/arch) and box culverts; size based on peak flow, slope, and soil/loads.
• B. Steel channels and arch culverts; size based on traffic volume only.
• C. Box culverts exclusively; size based on soil color.
• D. Pipe culverts with hexagonal shapes; size based on aesthetics.

Answer: (A)