Final answer:
Clayey soil is the most susceptible to frost action due to the expansion and contraction of ice. Sandy soil, loamy soil, and rocky soil are less prone to frost action. The correct option is C.
Step-by-step explanation:
Clayey soil is the type of soil that is most susceptible to frost action. When the moisture in clayey soil freezes, the expansion of ice causes the soil to crack and break apart. This can lead to the formation of terraces on slopes.
Sandy soil, on the other hand, has larger particles with more airspace, which allows water to drain quickly and reduces the risk of frost action.
Loamy soil, which is a mix of clay, silt, and sand, is less susceptible to frost action compared to clayey soil but more than sandy soil. Rocky soil is also less prone to frost action since the rocks provide stability and prevent the soil from expanding and contracting.
Hence, Option C is correct.