Consider the following method.

I$*$ missing precondition $*/$

public void someMethod$($int $j,$ int $k,$ String oldString$)$

$\{$

String newString $=$ oldString.substring $(j,k)$;

System.out.println$("$New string: $"+$ newString$)$;

$\}$

Which of the following is the most appropriate precondition for someMethod so that the call to substring does not throw an exception?

I$*$ Precondition: $$ oldstring.length$()$ Precondition: $jk*\frac{*}{?},jk*\frac{*}{?}\frac{?}{*}$

Precondition: $j$ and $k*\frac{*}{?}$

$D,*$ Precondition: $jk*\frac{*}{?}$ and $\frac{?}{*}$

Precondition: $j$ and $k*\frac{*}{?}$

$D,*$ Precondition: $jk*\frac{*}{?}$