Select an Appropriate Expression to Complete the Following Method, Which

Select an appropriate expression to complete the following method, which is designed to visit the elements in theList and replace each occurrence of the string "hello" with the string "goodbye". public static void helloGoodbye(LinkedList<String> theList)
{
ListIterator<String> iterator = theList.listIterator() ;
While (iterator.hasNext() )
{
If (iterator.next() .equals("hello") )
{
_____________________________
}
}
}

A) iterator.replace("hello", "goodbye") ;
B) iterator.next() = "goodbye";
C) iterator.previous("goodbye") ;
D) iterator.set("goodbye") ;