For the stability of a structure against seepage pressure according to Khosla’s creep theory, the critical gradient is A. Zero B. 0.25 C. 0.50 D. 1.00

The correct answer is: A. Zero

Khosla’s creep theory states that the critical gradient for the stability of a structure against seepage pressure is zero. This means that if the gradient of the water table is greater than zero, then the structure will be unstable and will likely collapse.

The other options are incorrect because they do not represent the critical gradient for the stability of a structure against seepage pressure according to Khosla’s creep theory.