Question $17(4$ points$)$

The exponential smoothing forecast for period $t+1$ is a weighted average of the

A$)$ forecast value in period $t$ with weight $$ and the actual value for period $t$ with weight $1-$

B$)$ actual value in period $t+1$ with weight $$ and the forecast for period $t$ with weight $1-$

C$)$ forecast value in period $t-1$ with weight $$ and the forecast for period $t$ with weight $1-$

D$)$ actual value in period $t$ with weight $$ and the forecast for period $t$ with weight $1-$