The correct answer is: C. much less than that of clayey soils.
Sandy soils are much less compressible than clayey soils. This is because sandy soils have a much lower void ratio than clayey soils. The void ratio is the ratio of the volume of voids to the total volume of the soil. A lower void ratio means that there is less space for the soil to compress.
Clayey soils have a high void ratio because they are made up of small particles that can pack together very tightly. When a load is applied to a clayey soil, the particles can slide past each other and the soil can compress. Sandy soils, on the other hand, are made up of larger particles that do not pack together as tightly. When a load is applied to a sandy soil, the particles cannot slide past each other as easily and the soil cannot compress as much.
The compressibility of a soil is an important factor to consider when designing foundations for buildings and other structures. A soil that is too compressible can cause the foundation to settle unevenly, which can lead to cracks in the structure. Sandy soils are less likely to cause this problem than clayey soils.