Final answer:
The correct answer is D) maximize audience exposure, as linear programming is used in media selection to optimize the allocation of a limited budget across media channels.
Step-by-step explanation:
Linear programming is a powerful mathematical method used to solve optimization problems, such as selecting the most effective media mixes, allocating fixed budgets across various media options, and optimizing audience exposure. When applied to the context of media selection, the goal of linear programming is to achieve the best allocation of a limited budget to different media channels to maximize audience exposure, thereby increasing the effectiveness of an advertising campaign. Hence, the right answer to the question is D) maximize audience exposure.