This question tests terminology. Consider the following class $($line numbers on the left$)$:

$1$ public class Cart $\{$

$2$ private ArrayList items;

$3$ private double price;

$4$

$5$ public Cart$($double price, ArrayList items$)\{$

$6$ this.price $=$ price;

$7$ this.items $=$ items;

$8\}$

$9$ public Cart$($double price$)\{$

$10$ this.price $=$ price;

$11$ this.items $=$ new ArrayList$<>()$;

$12\}$

$13$

$14$ public void addItem$($Item i$)\{$ items.add$($i$)$; $\}$

$15$

$16$ public void setPrice$($double d$)\{$ price $=$ d; $\}$

$17$

$18$ public double price$()\{$ return price; $\}$

$19\}$

Match each region $($one or more line numbers$)$ to the term that most$-$precisely describes it$.$