The effective stress friction angle of a saturated, cohesionless soil is $38^{\circ} .$ The ratio of shear stress to normal effective stress on the failure plane is

(A) 0.781

(B) 0.616

(C) 0.488

(D) 0.438

The effective stress friction angle of a saturated, cohesionless soil is $38^{\circ} .$ The ratio of shear stress to normal effective stress on the failure plane is

(A) 0.781

(B) 0.616

(C) 0.488

(D) 0.438

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