Topic: Feature Engineering

An ExampleSet has $40$ attributes and you wish to use Backward Elimination to find the most relevant features prior to modeling. What is the minimum number of iterations of this operator's subprocess before stopping? $($Select one$)$

A$.$

once

B$.$

$40$

C$.$

$41$

D$.$

$79$

E$.$

$80$

F$.$

$81$