In a soil specimen, the total stress, effective stress, hydraulic gradient, and critical hydraulic gradient are σ, σ’, i and ic, respectively. For initiation of quicksand condition, which one of the following statements is TRUE?

In a soil specimen, the total stress, effective stress, hydraulic grad

1.	In a soil specimen, the total stress, effective stress, hydraulic gradient, and critical hydraulic gradient are σ, σ’, i and ic, respectively. For initiation of quicksand condition, which one of the following statements is TRUE?
A.	σ’ = 0 and i = iC
B.	σ = 0 and i = iC
C.	σ’ ≠ 0 and i = iC
D.	σ’ ≠ 0 and i ≠ iC
Answer» B. σ = 0 and i = iC