An Improvement Index Indicates

An improvement index indicates:

A) whether a method other than the stepping-stone should be used.
B) whether a method other than the northwest-corner rule should be used.
C) how much total cost would increase or decrease if a single unit was reallocated to that cell.
D) whether the transportation cost in the upper left-hand corner of a cell is optimal.
E) how much total cost would increase or decrease if the largest possible quantity were reallocated to that cell.