Which statement correctly describes the $3-2-1$ backup rule?

Group of answer choices

$3$ media types, $2$ data copies, $1$ off$-$site copy

$3$ data copies, $2$ storage locations, $1$ on$-$site copy

$3$ storage locations, $2$ media types, $1$ on$-$site copy

$3$ media types, $2$ storage locations, $1$ off$-$site copy

$3$ data copies, $2$ media types, $1$ off$-$site copy