Which of the following is true about the Dorfman-Steiner condition? Question 7Answer a. The advertising-to-sales ratio is positively correlated with the price markup, i.e. (P - MC)/P b. The advertising-to-sales ratio is positively correlated with the price elasticity of demand c. The advertising-to-sales ratio is negatively correlated with the advertising elasticity of demand d. The advertising-to-sales ratio is negatively correlated with the Lerner Index