Take cross-sections at regular stations along the alignment, compute the area of each section, and multiply by the spacing; sum the volumes between successive sections.

• A. Take cross-sections at regular stations along the alignment, compute the area of each section, and multiply by the spacing; sum the volumes between successive sections.
• B. Use only a single cross-section to estimate volume.
• C. Apply the prismoidal formula directly without cross-sections.
• D. Estimate volume by measuring length and average depth.

Answer: (A)