Which of the following are good foundation materials for embankments?
A. Gravel-Sand-Silt mixture
B. Sand-Silt mixture
C. Silt-Clay mixture
D. Sand-Clay mixture
Choose the correct answer from the options given below
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Well-graded soils containing sand or gravel mixed with clay/silt have the highest compacted densities and shear strength. Purely fine-grained mixtures of silt and clay are compressible and should be avoided in foundations.