Alinear program has been solved and sensitivity analysis has or the objective function coefficients have been found. For ound is $80,$ the lower bound is $60,$ and the current value is ust be true if the profit on this variable is increased to $80$ a und?

A new corner point will become optimal

The optimal solution for all of the decision variables will remain

The range of optimality has been exceeded and the LP must be redundant constraint exists in the problem

he range of feasibility has been exceeded and the LP must be