Usually, there is an increase in the volume of sand caused by the films of water pushing the sand particles apart. This effect is called as

Usually, there is an increase in the volume of sand caused by the film

1.	Usually, there is an increase in the volume of sand caused by the films of water pushing the sand particles apart. This effect is called as
A.	Efflorescence
B.	Caving
C.	Boiling
D.	Bulking
E.	Expansion
Answer» E. Expansion