Now develop the best subset model by iteratively eliminating all insignificant$$ variables, using alphaequals$0\mathrm{.}10$ for the level of significance. Select the correct choice below and fill in the answer boxes to complete your choices.

$($Round to the nearest integer as$$ needed.$)$

A$.$

Unitsequals

$$

enter your response here plus$($

$$

enter your response here$)$timesJan plus$($

$$

enter your response here$)$timesFeb plus$($

$$

enter your response here$)$timesMar plus$($

$$

enter your response here$)$timesMay plus$($

$$

enter your response here$)$timesJun plus$($

$$

enter your response here$)$timesJul plus$($

$$

enter your response here$)$timesSep plus$($

$$

enter your response here$)$timesOct plus$($

$$

enter your response here$)$timesNov

B$.$

Unitsequals

$$

enter your response here plus$($

$$

enter your response here$)$timesYear plus$($

$$

enter your response here$)$timesJan plus$($

$$

enter your response here$)$timesMar plus$($

$$

enter your response here$)$timesApr plus$($

$$

enter your response here$)$timesMay plus$($

$$

enter your response here$)$timesJun plus$($

$$

enter your response here$)$timesJul plus$($

$$

enter your response here$)$timesAug plus$($

$$

enter your response here$)$timesSep plus$($

$$

enter your response here$)$timesOct

C$.$

Unitsequals

$$

enter your response here plus$($

$$

enter your response here$)$timesYear plus$($

$$

enter your response here$)$timesJan plus$($

$$

enter your response here$)$timesFeb plus$($

$$

enter your response here$)$timesApr plus$($

$$

enter your response here$)$timesMay plus$($

$$

enter your response here$)$timesJun plus$($

$$

enter your response here$)$timesJul plus$($

$$

enter your response here$)$timesSep plus$($

$$

enter your response here$)$timesOct plus$($

$$

enter your response here$)$timesNov