b) Interpret the slope in the linear model. Select the correct choice below and fill in the answer box to complete your choice. (Type an integer or a decimal.) A. The slope indicates that customer Income changes by $ enter your response here for every $1 increase in total yearly Purchase. B. The slope of enter your response here indicates the customer Income if the predicted total yearly Purchase was $0. C. The slope indicates that the total yearly Purchase changes by $ enter your response here for every $1 increase in customer Income. D. The slope of enter your response here is meaningless