What is wrong with the constructor in the following class:

public class Wallet $\{$

private int money;

public int Wallet$()\{$

$\}$

money $=100$;

public void pay$($int price$)\{$

money $-=$ price;

$\}$

$\}$

$($A$)$ The assignment in the constructor must be this $.$ money $=100$;

$($B$)$ It does not have any formal parameters.

$($C$)$ It is missing a throws declaration.

$($D$)$ It changes a field that is declared private.

$($E$)$ It specifies a return type but should not.