Which of the following foundation materials is most stable during earthquake shaking?

Question

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Bedrock is the most stable foundation material during earthquake shaking because it is a solid, unyielding material that is not susceptible to liquefaction or other forms of soil failure. It provides a strong base for structures to resist lateral forces and vibrations during an earthquake. Unconsolidated moist soil (B) and water-saturated sand (C) are both prone to liquefaction, which can cause the soil to lose strength and stiffness and potentially lead to landslides and other types of ground failure during an earthquake. Sand and mud (D) may also undergo liquefaction and lose their ability to support a foundation.

Which of the Following Foundation Materials Is Most Stable During