Let n be the number of oil refineries at t years since 2005. A reasonable model of the number of oil refineries is n = - 3.16t + 148.32. a. What is the slope? What does it mean in this situation? b. What is the n-intercept? What does it mean in this situation? c. Predict the number of refineries in 2017. . . . a. What is the slope? m= What does the slope mean in this situation? O A. It means that the number of refineries is decreasing by about 3.16 per year. O B. It means that the number of refineries is decreasing by about 148.32 per year. O C. It means the number of refineries in 2005 was about 148.32. O D. It means the number of refineries in 2005 was about 3.16