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