I formulate a linear optimization problem. I am told that the shadow price of one of my constraints is 10. This is the only information I have from the sensitivity report for this problem. Which of the following statements is true?

a) If I increase the right-hand side of this constraint within the allowable increase, the optimal objective value increases. b) If I decrease the right-hand side of this constraint, I always need to resolve the problem in order to evaluate the change in the optimal objective value. c) If I increase the right-hand side of this constraint, the optimal solution is unchanged. d) I don't have enough information to conclude that any of these statements are true