You are given some quarterly time series data { X}. The time series display shows a clear linear trend over time plus a quarterly seasonal pattern. There appears to be constant variance. Which of the following stationary process should be considered as a starting model? Select one: O A . (1 - B)(1 - B4) Xt O B. B4(1 - B)Xt O c. (1 - B4) (1 - B)Xt O D. (1 - B4) Xt O E. B4(1 - B)4Xt