If a Time Series Exhibits Increasing Seasonal Variation,one Approach Is

Multiple Choice

If a time series exhibits increasing seasonal variation,one approach is to first use a ______________ transformation that produces a transformed time series that exhibits constant seasonal variation.Then,_________ variables can be used to model the time series with constant seasonal variation.

A) autocorrelation,dummy
B) fractional power,dummy
C) fractional power,constant
D) autocorrelation,constant