For the basic feasible solution to remain optimal A)all c_j -z_j values must remain $\le$ 0. B)no objective function coefficients are allowed to change. C)the value of the objective function must not change. D)each of the above is true.

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For a basic feasible solution to remain optimal in linear programming, all reduced costs (c_j - z_j) must be less than or equal to zero. This ensures that there is no other feasible solution that can improve the objective function value.

For the Basic Feasible Solution to Remain Optimal A)all Cj ≤\le≤

For the Basic Feasible Solution to Remain Optimal
A)all C_j $\le$