What is the difference between the area-volume method and end-area method in practice?

What is the difference between the area-volume method and end-area method in practice?

• A. Area-volume uses cross-sections along the line with spacing.
• B. End-area uses the area under the surface.
• C. End-area uses cross-sections along the line with spacing, while area-volume uses the area under the surface or model to compute volumes.
• D. They are identical methods.

Answer: (C)