How is relative compaction expressed in soil compaction assessments?

How is relative compaction expressed in soil compaction assessments?

• A. The ratio of wet density to dry density.
• B. The ratio of maximum dry density to in-situ density expressed as a percentage.
• C. The ratio of in-situ dry density to maximum dry density expressed as a percentage.
• D. The difference between maximum dry density and in-situ dry density.

Answer: (C)