Which statement is most true about three$-$tier client$/$server architectures?

Group of answer choices

The client in $3$ tier architectures must always be a thin client

$3-$tier architectures must have a data or database behind it

The client in $3$ tier architectures must always be a fat client

The $2$nd and $3$rd tier may or may not be on different computers

All dynamic websites must use $3$ tier architectures