The level smoothing constant $(\backslash$alpha $)$ of the simple exponential smoothing model

A$.$

should have a value closer to one, the greater the revision in the current forecast given the current forecast error.

B$.$

should have a value close to zero if the underlying data is relatively smooth.

C$.$

should have a value closer to zero, the greater the revision in the current forecast given the current forecast error.

D$.$

should have a value close to one if the underlying data is relatively erratic.