Q$2.$ Which of the following tibbles matches tibble$1?$

tibble$1<-$ tibble$($

~x$,$ ~y$,$ ~z$,$

$1,1,$ "dog",

$2,4,$ "dog",

$3,9,$ "cat"

$)$

tribble$1$

## # A tibble: $3$ x $3$

## x y z

##

## $111$ dog

## $224$ dog

## $339$ cat

A$.$ tibble$($x $=1$:$3,$ y $=$ x$^2,$ z $=$dog$$:$$cat$)$

B$.$ tibble$($x $=1$:$4,$ y $=$ x$^2,$ z $=$ c$($rep$($dog$,2),$rep$($cat$,2)))$

C$.$ tibble$($x $=1$:$3,$ y $=$ x$2,$ z $=$dog$$:$$cat$)$

D$.$ tibble$($x $=1$:$3,$ y $=$ x$^2,$ z $=$ c$($dog$,$dog$,$cat$))$