A demand forecasting method is accurate when $\_\_\_\_.$

bias is small

mean absolute deviation $($MAD$)$ is small

mean squared error $($MSE$)$ is small

all of the above

only A and B

aggregate forecasts are usually less accurate than disaggregate forecasts

forecasts are inaccurate

long$-$term forecasts are usually more accurate than short$-$term forecasts

all of the above