A Transportation Problem Has Improvement Indices of 5,4,0,and -3

Multiple Choice

A transportation problem has improvement indices of 5,4,0,and -3.Which of the following is always true?

A) The transportation model is at its ideal solution.
B) The transportation model is at a feasible solution.
C) The total cost saved by changing one unit on the route with an improvement index of 5 would be $5.
D) The transportation matrix has four empty squares.
E) Both B and D