Which of the following statements is/are incorrect?

a. We use primal simplex when an additional constraint is added to the LP primal problem

b. We use dual simplex when an additional variable is added to the LP primal problem

c. None of the options is incorrect

d. When an additional constraint is added to the LP primal problem, the optimal solution of the new LP problem will always remain the same as the original LP primal

problem.

e. When a new variable is added to the LP primal problem, we can find the optimal solution of the new LP problem starting from the optimal solution of the original LP

primal problem