Answer:
b) and c both are same answer- Because the ground is nearly saturated with water the vibrations can cause the ground to experience soil liquefaction.
Step-by-step explanation:
Soil liquefaction is the process in which the soil will loose its strength and stiffness due to the effect of applied stress which might be caused by earthquake or change in stress condition.
Due to his process, soil in solid state will be like a liquid fluid and will be unable to support the buildings and structures.
In soft, sandy soil saturated with water the chances of soil liquification is very high due to vibration of earthquake.