The pressure at the exit gradient at which the upward force is equal to the submerged weight of the soil is called the ___________

The pressure at the exit gradient at which the upward force is equal t

1.	The pressure at the exit gradient at which the upward force is equal to the submerged weight of the soil is called the ___________
A.	Floatation gradient
B.	Bursting gradient
C.	Critical gradient
D.	All of the mentioned
Answer» E.