Consider the following block of code:

$1$ z $=[]$

$2$ x $=\{1$ : 'one' $,2$ : 'two' $,3$ : 'three' $\}$

$3$ for y in x :

$4$ z $.$ append $($ y $)$

What is the value of z$?$

$[1,2,3]$

$[\{1$: 'one'$\},\{2$: 'two'$\},\{3$: 'three'$\}]$

$[\text{'}$one$\text{'},$ 'two', 'three'$]$

$[(1,$ 'one'$),(2,$ 'two'$),(3,$ 'three'$)]$