Which of the Following Is a Function of What-If Analysis

Which of the following is a function of what-if analysis?

A) establishing relationships between many variables and changing some of the variables to see how the others are affected
B) establishing relationships between different variables by keeping them constant
C) encompassing a variety of statistical techniques that analyze current and historical facts to make predictions about future events
D) establishing a target value for a particular metric and telling the program which variable to change to try to reach the goal