Which of the following is not an act passed by Congress with the goal of protecting children from being exposed to pornography via the Internet:

$1.$

The Children$$s Protection from Indecency Act $($CPI$).$

$2.$

The Children$$s Online Protection Act $($COPA$).$

$3.$

The Children$$s Internet Protection Act $($CIPA$).$

$4.$

The Communications Decency Act $($CDA$).$