When the underlying average of a time series is very stable and there is no trend, cyclical, or seasonal influences,
a. A simple moving average forecast with n = 20 should outperform a simple moving average forecast with n = 3.
b. A simple moving average forecast with n = 3 should outperform a simple moving average forecast with n = 20.
c. An exponential moving forecast with w = 0.50 should outperform the simple moving average forecast with w= 0.01.