As long as the slope of the objective function stays between the slopes of the binding constraints a. the value of the objective function won't change. b. there will be alternative optimal solutions, c. the values of the dual variables won't change. d. there will be no slack in the solution. 3. All of the following statements about a redundant constraint are correct EXCEPT a. A redundant constraint does not affect the optimal solution b. A redundant constraint does not affect the feasible region. c. Recognizing a redundant constraint is easy with the graphical solution method. d. At the optimal solution, a redundant constraint will have zero slack, 4. Which of the following is an assumption of an LP model a. Divisibility b. Proportionality c. Additivity d) All of the above