Which of the Following Questions Would Be Best Answered Using

Which of the following questions would be best answered using simple regression?

A) Are consumers' perceptions of quality related to their perceptions of prices when the effect of brand image is controlled?
B) Can the variation in market share be accounted for by the size of the sales force?
C) Do retailers, wholesalers, and agents differ in their attitudes toward the firm's distribution policies?
D) How do advertising levels (high, medium, and low) interact with price levels (high, medium, and low) to influence brand sales?
E) What factors can be thought of as being related to service quality as opposed to product satisfaction?