The correct answer is A. What-if analysis.
Sensitivity analysis is a technique that is used to determine how the output of a model will change in response to changes in the input variables. It is a type of what-if analysis, which is a general term for any analysis that involves changing the values of input variables to see how the output changes.
If-so analysis is a type of what-if analysis that is used to determine the consequences of a particular event or action. What-then analysis is a type of what-if analysis that is used to determine the best course of action to take in a particular situation. And-or analysis is a type of what-if analysis that is used to determine the possible outcomes of a particular situation.
In conclusion, sensitivity analysis is a type of what-if analysis that is used to determine how the output of a model will change in response to changes in the input variables.