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Answer (A) is correct . Regression analysis is a statistical technique for measuring the relationship between variables. It estimates the component of the dependent variable that varies with changes in the independent variable and the component that does not vary.

Answer (B) is incorrect because Game theory is a mathematical approach to decision making in which the actions of competitors are considered.
Answer (C) is incorrect because Sensitivity analysis studies how changes in one or more variables affect the optimal solution in a linear programming model.
Answer (D) is incorrect because Queuing theory is used to minimize the sum of the costs of waiting lines and servicing waiting lines when items arrive randomly at a service point and are serviced sequentially.