Which of the Following Most Accurately Identifies the Purpose of a Marketing-Mix

Which of the following most accurately identifies the purpose of a marketing-mix model?

A) to identify the most appropriate target audience for a new product
B) to evaluate the contribution that each component of a marketing program makes to market performance
C) to identify the most effective media strategies to use to reach a target audience
D) to evaluate the effect of supply and price on level of customer demand
E) to select the most efficient marketing channels for a given product