How does Modified Proctor differ from Standard Proctor?

How does Modified Proctor differ from Standard Proctor?

• A. Modified Proctor uses lower energy than Standard.
• B. There is no difference between the two tests.
• C. Modified Proctor uses the same energy as Standard but more samples.
• D. Modified Proctor uses higher compaction energy to achieve denser fill, applicable to stronger bases; Standard uses less energy for general subgrades.

Answer: (D)