Of the Smoothing Methods, Which One Does the Level L_t

Multiple Choice

Of the smoothing methods, which one does the level L_t, as well as the trend T_t, adapt over time and is a best fit when the time series expresses no seasonality?

A) simple exponentially smoothing technique
B) the moving average technique
C) the Holt exponential smoothing method
D) the Holt-Winters exponential smoothing method