(b)Which one of the following best describes the explanatory (independent) and response (dependent) variables? The explanatory variable is the brand of chocolate milk and the response variable is the percentage of shoppers who have purchased ChocMoo. The explanatory variable is the percentage of shoppers who have purchased ChocMoo and the response variable is gender. The explanatory variable is gender and the response variable is the percentage of shoppers who have purchased ChocMoo. The explanatory variable is gender and the response variable is the brand of chocolate milk