Maximization : Sensitivity Range

MULTIPLE CHOICE
For a maximization problem, assume that a constraint is binding. If the original amount of a resource is 4 lbs., and the range of feasibility (sensitivity range) for this constraint is from 3 lbs. to 6 lbs., increasing the amount of this resource by 1 lb. will result in the:
a. same product mix, different total profit
b. different product mix, same total profit as before
c. same product mix, same total profit
d. different product mix, different total profit