Select the correct statement. A. The greater the viscosity, the greater is permeability. B. The greater the unit weight, the greater is permeability. C. The greater the unit weight, the smaller is permeability. D. Unit weight does not affect per-meability.

The correct answer is: D. Unit weight does not affect permeability.

Viscosity is a measure of a fluid’s resistance to flow. The greater the viscosity, the more resistance there is to flow. Unit weight is a measure of the weight of a unit volume of a material. The greater the unit weight, the heavier the material is.

Permeability is a measure of how easily a fluid can flow through a material. The greater the permeability, the easier it is for a fluid to flow through the material.

Viscosity and unit weight are not related to permeability. The greater the viscosity, the greater the resistance to flow, but this does not affect how easily a fluid can flow through a material. The greater the unit weight, the heavier the material is, but this does not affect how easily a fluid can flow through the material.

Therefore, the correct answer is: D. Unit weight does not affect permeability.