In slope stability analysis, what is defined as the factor of safety?

In slope stability analysis, what is defined as the factor of safety?

• A. It is the ratio of driving forces to resisting shear; used to predict failure.
• B. It is a measure of soil strength only under dry conditions.
• C. It is the total vertical load applied to the slope in design.
• D. It is the ratio of resisting shear to driving forces; used to evaluate stability.

Answer: (D)