Which code segment should you use?

You create a Web page that contains the following code.

You need to provide the following implementation. Each time the AddFile button is clicked, a new
div element is created. The new div element is appended after the other file upload div elements
and before the AddFile span. Each new element has a unique identifier. Which code segment should
you use?

A.
$(“#AddFile”).click(function () {
var id = “File” + ++lastId;
var item = $(“.File:first”).clone(true);
$(“input:file”, item).attr({ id: id, name: id });
item.insertBefore(“#AddFile”);
});

B.
$(“#AddFile”).click(function () {
var id = “File” + ++lastId;

$(“.File:first”).clone(true).attr({ id: id, name: id }).insertBefore
(“#AddFile”);
});

C.
$(“#AddFile”).click(function () {
var id = “File” + ++lastId;
});

D.
$(“#AddFile”).click(function () {
var id = “File” + ++lastId;
var item = $(“.File:first”).clone(true);
$(“input:file”, item).attr({ id: id, name: id });
item.insertAfter(“input[type=file]”);
});

Explanation:
clone() Method
(http://api.jquery.com/clone/)