The Mohr-Coulomb failure criterion, which is defined by shear strength (s) consisting of effective normal stress (σ’), cohesion (c’) and effective angle of friction (ϕ’), is given by,

The Mohr-Coulomb failure criterion, which is defined by shear strength

1.	The Mohr-Coulomb failure criterion, which is defined by shear strength (s) consisting of effective normal stress (σ’), cohesion (c’) and effective angle of friction (ϕ’), is given by,
A.	s = σ’ + c’ tanϕ’
B.	s = c’ tanϕ’ + σ’
C.	s = c’ – σ’ tanϕ’
D.	s = c’ + σ’ tanϕ’
Answer» E.