Which of the Following Is True About the Sensitivity Analysis

Which of the following is true about the sensitivity analysis for integer optimization problems?

A) Sensitivity reports are readily available for integer optimization problems similar to the linear programming problems.
B) Because of the discrete nature of the integer optimization, Excel Solver takes much more time to calculate objective function coefficient ranges, shadow prices, and right-hand-side ranges.
C) The sensitivity analysis is not important for integer problems.
D) To determine the sensitivity of the solution to changes in model inputs for integer optimization problems, the data must be changed and the problem must be re-solved.