How does an earthquake isolation system work? options: 

a. A deep mote is dug around a building and filled with water so that surface waves do not come in contact with the building's foundation. 

b. Buildings are connected to very deep steel piles that prevent sliding when near-surface soils liquefy. 

c. Buildings are mounted on isolators with rubber layers that absorb side-to-side motion. 

d. There is no way to isolate a building from strong shaking.