Advantages of Regression model forecasting over smoothing model forecasting include

Question $11$ Select one:

a$.$

The greater simplicity and smaller cost of regression models relative to smoothing models

b$.$

Less data are required and relatively less expertise is required in regression

c$.$

Regression allows the for scenario and strategy analysis where smoothing models do not generally allow for scenario analysis

d$.$

Regression models always produce unbiased and efficient forecasts

e$.$

Both $($c$)$ and $($d$)$