Code example $13-1$

CheckBox mailingCheckBox $=$ new CheckBox $("$Add to mailing list"$)$;

mailingCheckBox. setSelected$($true$)$;

bool state $=$ mailingCheckBox.isSelected$())$

$($Refer to code example $13-1)$ What is the value of the variable named state after the code runs?

null

true

false

depends on the user's input