$15\mathrm{.}2[5$ points$]$ The leftmost column contains an array of $24$ integers to be sorted; the rightmost

column contains the integers in sorted order; the other columns are the contents of the array at

some intermediate step during one of the five sorting algorithms listed below. Match each algorithm

by providing, from left to right, the letter that belongs in the box under the corresponding column.

Use each letter exactly once.

Choices:

A$.$ Original array

B$.$ Selection sort

C$.$ Insertion sort

D$.$ Mergesort $($top$-$down$)$

E$.$ Quicksort $($standard$,$ no shuffle$)$

F$.$ Heapsort

G$.$ Sorted array